Debt Disclosure [Abstract] LONG-TERM DEBT Debt Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Changes in Outstanding Share Options Awards [Table] Changes in Outstanding Share Options Awards [Table] Changes In Outstanding Share Options Awards [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Stock Options [Member] Employee Stock Option [Member] Statement [Line Items] Statement [Line Items] Outstanding at the beginning of the year Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Exercised during the year Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Outstanding at the end of the year Exercisable at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Outstanding at the beginning of the year Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Exercised during the period Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Outstanding at the end of the year Weighted Average Exercise Price Exercisable at the end of the period Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Consolidated Investment Products [Abstract] Consolidated Investment Products Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table] Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Swap [Member] Swap [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 3 Assets [Member] Level 3 Assets [Member] Level Three Assets [Member] Range [Axis] Range [Domain] Minimum [Member] Maximum [Member] Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Senior Secured Bank Loans And Bonds [Member] Senior Secured Bank Loans And Bonds [Member] Senior Secured Bank Loans And Bonds [Member] Private Equity Funds [Member] Private Equity Funds [Member] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] VIEs [Member] VIEs [Member] VIEs [Member] CLO [Member] Collateralized Loan Obligations [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] VIEs invested in and consolidated, number of entities Variable Interest Entity, Initial Consolidation, Number of Entities Variable Interest Entity, Initial Consolidation, Number of Entities VOE invested in and consolidated, number of entities Voting Interest Entity, Initial Consolidation, Number of Entities Voting Interest Entity, Initial Consolidation, Number of Entities Total assets Assets Pay interest at Libor or Euribor plus Collateralized Loan Obligations Terms Of Arrangements Interest Rate Margin Spread High Collateralized Loan Obligations Terms Of Arrangements Interest Rate Margin Spread High Fair value, option, aggregate differences, long-term debt instruments Fair Value, Option, Aggregate Differences, Long-term Debt Instruments Collateral assets, default percentage Collateral Assets Default Percentage Collateral Assets Default Percentage Weighted average maturity (years) Issued Note Maturity Average Years Issued Note Maturity Average Years Outstanding balance on the notes issued by consolidated CLOs exceeds their fair value by approximately Outstanding Balance On Notes Issued By Consolidated Clos In Excess Of Fair Value Outstanding Balance On Notes Issued By Consolidated Clos In Excess Of Fair Value Notes issued by collateralized loan obligations terms of arrangements interest rate margin spread low Notes Issued By Collateralized Loan Obligations Terms Of Arrangements Interest Rate Margin Spread Low Notes Issued By Collateralized Loan Obligations Terms Of Arrangements Interest Rate Margin Spread Low Notes issued by collateralized loan obligations terms of arrangements interest rate margin spread high Notes Issued By Collateralized Loan Obligations Terms Of Arrangements Interest Rate Margin Spread High Notes Issued By Collateralized Loan Obligations Terms Of Arrangements Interest Rate Margin Spread High Open swap agreements Derivative, Number of Instruments Held Variable Interest Entity Term Variable Interest Entity Term Variable Interest Entity Term Income Statement [Abstract] Operating revenues: Revenues [Abstract] Investment management fees Investment Advisory Fees Service and distribution fees Distribution and Servicing Fees Performance fees Performance Fees Other Revenue, Other Financial Services Total operating revenues Revenues Operating expenses: Operating Expenses [Abstract] Employee compensation Labor and Related Expense Third-party distribution, service and advisory Third party distribution service and advisory Includes: (1) renewal commissions paid to independent financial advisors for as long as the clients' assets are invested and are payments for the servicing of the client accounts, (2) the amortization of upfront commissions paid to brokers/dealers for sales of fund shares with a contingent deferred sales charge and (3) sub-transfer agency fees that are paid to a third party for transferring shares of a mutual fund or units of a unit trust into the investor's name. Marketing Marketing Expense Property, office and technology Communications, Information Technology and Occupancy General and administrative General and Administrative Expense Transaction and integration Total Transaction And Integration Charges Total Transaction And Integration Charges Total operating expenses Operating Expenses Operating Income (Loss) Operating Income (Loss) Other income/(expense): Nonoperating Income (Expense) [Abstract] Equity in earnings of unconsolidated affiliates Income (Loss) from Equity Method Investments Interest and dividend income Investment Income, Interest and Dividend Interest expense Interest Expense Other gains and losses, net Other Nonoperating Income (Expense) Other income/(loss) of CSIP, net Other Nonoperating Income (Expense), Consolidated Sponsored Investment Products Other Nonoperating Income (Expense), Consolidated Sponsored Investment Products Interest and dividend income of CIP Interest Income Of Consolidated Investment Products Income derived by the entity's consolidated investment products from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or the forbearance of money. Interest expense of CIP Interest Expense Of Consolidated Investment Products The cost of borrowed funds by the entity's consolidated investment products accounted for as interest that was charged against earnings during the period. Other gains/(losses) of CIP, net Gains and losses of consolidated investment products net This item represents the net total realized and unrealized gain (loss) included in earnings of the entity's consolidated investment products for the period as a result of selling or holding marketable securities. Additionally, this item would include any gains or losses realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments of the subject investments. Income from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax provision Income Tax Expense (Benefit) Income from continuing operations, net of taxes Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Income/(loss) from discontinued operations, net of taxes Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net (income)/loss attributable to noncontrolling interests in consolidated entities Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to common shareholders Net Income (Loss) Attributable to Parent Earnings per share: Earnings Per Share [Abstract] Basic: Earnings Per Share, Basic [Abstract] Earnings per share from continuing operations (usd per share) Income (Loss) from Continuing Operations, Per Basic Share Earnings per share from discontinued operations (usd per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Basic earnings per share (usd per share) Earnings Per Share, Basic Diluted: Earnings Per Share, Diluted [Abstract] Earnings per share from continuing operations (usd per share) Income (Loss) from Continuing Operations, Per Diluted Share Earnings per share from discontinued operations (usd per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Diluted earnings per share (usd per share) Earnings Per Share, Diluted Dividends declared per share Common Stock, Dividends, Per Share, Declared Equity [Abstract] Shares repurchased Treasury stock, shares acquired, net of shares witheld for vesting events Treasury stock, shares acquired, net of shares witheld for vesting events. Cost of repurchased shares Treasury Stock Value Acquired Cost Method Net Of Shares Withheld For Vesting Events Treasury stock, value acquired, cost method, net of shares withheld for vesting events. Shares withheld to meet employees' tax withholding obligations Shares Paid for Tax Withholding for Share Based Compensation Fair values of shares withheld Fair Value Of Shares Withheld Fair Value Of Shares Withheld Share repurchase plan, remaining authorized amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Treasury stock shares Treasury Stock, Shares Treasury shares held, as unvested restricted stock awards Treasury shares held as unvested restricted stock awards Unvested restricted stock awards (RSA) held as treasury shares for which dividend and voting rights apply. RSA is a share of stock granted to an employee for which sale is prohibited for a specified period of time or performance conditions are met. Common shares market price (per share) Common Shares Market Price Per Share Common Shares Market Price Per Share Treasury shares market value Treasury Stock Common Shares Aggregate Market Value Treasury Stock Common Shares Aggregate Market Value Fair Value Inputs, Assets and Liabilities, Quantitative Information [Table] Fair Value Inputs, Assets and Liabilities, Quantitative Information [Table] Fair Value Inputs, Assets and Liabilities, Quantitative Information [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Third party appraisal [Member] Third party appraisal [Member] Third party appraisal [Member] Valuation Technique [Axis] Valuation Technique [Axis] Valuation Technique [Domain] Valuation Technique [Domain] Market Comparable [Member] Market Comparable [Member] Market Comparable [Member] Discounted Cash Flow Valuation Technique [Member] Discounted Cash Flow Valuation Technique [Member] Discounted Cash Flow Valuation Technique [Member] Interest Rate By Type [Axis] Interest Rate By Type [Axis] Interest Rate By Type [Axis] Interest Rate Type [Domain] Interest Rate Type [Domain] Interest Rate Type [Domain] LIBOR [Member] LIBOR [Member] LIBOR [Member] Range [Axis] Range [Domain] Minimum [Member] Maximum [Member] Weighted Average [Member] Weighted Average [Member] Major Types of Debt and Equity Securities [Axis] Private Equity Funds, Priced Using Private Market Transactions [Member] Private Equity Funds, Priced Using Private Market Transactions [Member] Private Equity Funds, Priced Using Private Market Transactions [Member] Equity Securities [Member] Equity Securities [Member] Asset-backed Securities [Member] Asset-backed Securities [Member] Private Equity Fund, Equity Securities [Member] Private Equity Fund, Equity Securities [Member] Private Equity Fund, Equity Securities [Member] Collateralized Loan Obligations [Member] Private Equity Funds, Priced Using NAV Practical Expedient [Member] Private Equity Funds, Priced Using NAV Practical Expedient [Member] Private Equity Funds, Priced Using NAV Practical Expedient [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Collateralized Loan Obligations, By Year [Axis] Collateralized Loan Obligations, By Year [Axis] Collateralized Loan Obligations, By Year [Axis] Collateralized Loan Obligations, By Year [Domain] Collateralized Loan Obligations, By Year [Domain] [Domain] for Collateralized Loan Obligations, By Year [Axis] Two Thousand Twelve And Thereafter [Member] Two Thousand Twelve And Thereafter [Member] Two Thousand Twelve And Thereafter [Member] Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] Private Equity Fund Assets Private Equity Fund Assets Private Equity Fund Assets Liabilities Liabilities Derivative Revenue Multiple Derivative Revenue Multiple Derivative Revenue Multiple Derivative Discount Rate Derivative Discount Rate Derivative Discount Rate Fair Value Inputs, Probability of Default Fair Value Inputs, Probability of Default Assumed Default Rate, less than one year Fair Value Inputs, Probability Of Default, Less Than One Year Fair Value Inputs, Probability of Default, Less Than One Year Assumed Default Rate, more than one year Fair Value Inputs, Probability Of Default, More Than One Year Fair Value Inputs, Probability Of Default, More Than One Year Derivative, Basis Spread on Variable Rate Derivative, Basis Spread on Variable Rate Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Partnership and trust investments [Member] Partnership And Trust Investments [Member] Partnership and trust investments [Member] Investments In Invesco Mortgage Capital Inc. [Member] Investments In Invesco Mortgage Capital Inc. [Member] Investments in Invesco Mortgage Capital Inc [Member] Total Maximum Risk Of Loss Associated With VIEs [Member] Total Maximum Risk Of Loss Associated With VIEs [Member] Total max risk of loss associated with VIEs [Member] Carrying Value Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets Company's Maximum Risk of Loss Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Investments [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Seed Money [Member] Seed Money [Member] Seed Money [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Net realized gains/losses transferred from accumulated other comprehensive income Net Realized Gains (Losses) Transferred From Other Comprehensive Income Net realized Number of affiliated funds holding seed money Number of Affiliated Funds Holding Seed Money Number of Affiliated Funds Holding Seed Money Other-than-temporary impairment charges on seed money investments Other than Temporary Impairment Losses, Investments Available-for-sale debt securities maturing in one to five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Available-for-sale debt securities maturing in five to ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Gains and losses on trading securities Trading Securities, Change in Unrealized Holding Gain (Loss) Antidilutive securities excluded from computation of earnings per share, amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Contingently issuable share excluded Contingently issuable share excluded Contingently issuable shares that were excluded from the computation of diluted earnings per share because the necessary performance conditions for the shares to be issuable had not yet been satisfied at the end of the period Fair Value, Assets Measured on Recurring Basis, Disclosure Items [Domain] Level 3 Liabilities [Member] Level 3 Liabilities [Member] Level Three Liabilities [Member] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance (Asset) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Purchases (Asset) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Sales (Asset) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Issuances (Asset) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Settlements (Asset) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Deconsolidation of CIP deconsolidation of consolidated investment products level three deconsolidation of previously consolidated investment products level three fair value measurement Gains and losses included in the Consolidated Statement of Income (Asset) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Transfers to Level 2 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Foreign exchange (Asset) Foreign Currency Transaction Gain Loss Realized Level Three Assets Foreign Currency Transaction Gain Loss Realized Level Three Assets Ending balance (Asset) Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance (Liability) Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Purchases (Liability) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Sales (Liability) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales Issuances (Liability) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Settlements (Liability) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Gains and losses included in the Consolidated Statements of Income (Liability) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Transfers to Level 2 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net Foreign exchange (Liability) Foreign Currency Transaction Gain (Loss), Realized Ending balance (Liability) Net unrealized gains/losses attributable to investments Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Schedule of Investments [Abstract] Investments of CSIP Investments, Consolidated Sponsored Investment Products Investments, Consolidated Sponsored Investment Products Cash and cash equivalents of CSIP Cash And Cash Equivalents, Consolidated Sponsored Investment Products, At Carrying Value Cash And Cash Equivalents Of Consolidated Sponsored Investment Products Accounts receivable and other assets of CSIP Accounts Receivable And Other Assets, Consolidated Sponsored Investment Products, Net Accounts Receivable And Other Assets Of Consolidated Sponsored Investment Products Assets of consolidated sponsored investment products (CSIP) Assets of consolidated sponsored investment products Assets of consolidated sponsored investment products Other liabilities of CSIP Other Liabilities, Consolidated Sponsored Investment Products Other Liabilities, Consolidated Sponsored Investment Products Equity attributable to redeemable noncontrolling interests Redeemable Noncontrolling Interest, Consolidated Sponsored Investment Products Redeemable Noncontrolling Interest, Consolidated Sponsored Investment Products Equity attributable to nonredeemable noncontrolling interests Nonredeemable Noncontrolling Interest, Consolidated Sponsored Investment Products Nonredeemable Noncontrolling Interest, Consolidated Sponsored Investment Products Invesco's net interests in CSIP Net Interests In Consolidated Sponsored Investment Products Net Interests In Consolidated Sponsored Investment Products Invesco's net economic interests as a percentage of investments of CSIP Net Interests, Percentage Of Investments Of Consolidated Sponsored Investment Products Net Interests, Percentage Of Investments Of Consolidated Sponsored Investment Products Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Unsettled fund receivables Unsettled fund receivables Amounts due from funds or fund investors as of the balance sheet date for normal purchases or redemptions of investment products for which a receivable is recorded on the trade date. Accounts receivable Accounts Receivable, Net Investments Investments Cash and cash equivalents of CIP Cash and cash equivalents of consolidated investment products Includes currency of the entity's consolidated investment products on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts held by the entity's consolidated investment products that have the general characteristics of demand deposits in that the consolidated investment products may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents. Accounts receivable and other assets of CIP Accounts receivable and other assets of consolidated investment products Amount due from customers or clients of the entity's consolidated investment products within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the net realizable fair value by an allowance established by the consolidated investment product entity of the amount it deems uncertain of collection. Investments of CIP Investments Of Consolidated Investment Products Investment in Subsidiaries Assets held for policyholders Separate Account Assets Prepaid assets Prepaid Expense Other assets Other Assets Property and equipment, net Property, Plant and Equipment, Net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill LIABILITIES Liabilities [Abstract] Accrued compensation and benefits Employee-related Liabilities Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Debt of CIP Long Term Debt Of Consolidated Investment Products Sum of the carrying values as of the balance sheet date of all long-term debt of the entity's consolidated investment products, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premium, if any. Other liabilities of CIP Other liabilities of consolidated investment products Aggregate carrying amount as of the balance sheet date of current obligations of the entity's consolidated investment products not separately disclosed in the balance sheet due to materiality considerations. Current liabilities are expected to be paid within one year (or the normal operating cycle, if longer). Policyholder payables Separate Accounts, Liability Unsettled fund payables Unsettled fund payables Amounts due to funds or fund investors as of the balance sheet date for normal purchases or redemptions of investment products for which a payable is recorded on the trade date. Long-term debt Long-term Debt Deferred tax liabilities, net Deferred Tax Liabilities, Net Total liabilities Commitments and contingencies (See Note 11) Commitments and Contingencies TEMPORARY EQUITY Temporary Equity [Abstract] Redeemable Noncontrolling Interest, Equity, Carrying Amount Redeemable Noncontrolling Interest, Equity, Carrying Amount PERMANENT EQUITY Stockholders' Equity Attributable to Parent [Abstract] Equity attributable to common shareholders: Stockholders Equity Attributable to Parent Abstract Stockholders Equity Attributable to Parent Abstract. Common shares ($0.20 par value; 1,050.0 million authorized; 490.4 million shares issued as of June 30, 2014 and December 31, 2013) Common Stock, Value, Issued Additional paid-in-capital Additional Paid in Capital, Common Stock Treasury shares Treasury Stock, Value Retained earnings Retained Earnings (Accumulated Deficit) Retained earnings appropriated for investors in CIP Retained earnings accumulated deficit appropriated for investors in consolidated investment products The cumulative amount of the reporting entity's consolidated investment products' undistributed earnings or deficit. Accumulated other comprehensive income, net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Total equity attributable to common shareholders Stockholders' Equity Attributable to Parent Equity attributable to nonredeemable noncontrolling interests in consolidated entities Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and equity Liabilities and Equity Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Line of Credit [Member] Line of Credit [Member] Letter of Credit [Member] Letter of Credit [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Federal Funds Rate [Member] Prime Rate [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Line of credit facility, amount outstanding Line of Credit Facility, Amount Outstanding Line of credit facility, basis spread on interest rate, percentage Debt Instrument, Basis Spread on Variable Rate Line of credit facility, margin for LIBOR-based loans, percentage Margin For Libor Base Loans Percentage Margin for LIBOR base loans, percentage Line of credit facility, margin for base-rate loans, percentage Margin for base rate loans, percentage Margin for base rate loans, percentage Line of credit facility commitment fee amount, percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of credit facility, covenant terms, Debt to EBITDA ratio Covenant Ratio Debt Ebitda Maximum Numerator Covenant ratio debt EBITDA maximum numerator Line of credit facility, covenant terms, Coverage ratio Covenant ratio coverage maximum numerator Covenant ratio coverage maximum numerator Line of Credit Facility, Capacity Available for Trade Purchases Line of Credit Facility, Capacity Available for Trade Purchases Letters of credit, renewable term Letters of Credit, Renewable Term Letters of Credit, Renewable Term Fair Value Measurements [Member] Estimate of Fair Value Measurement [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) [Member] Fixed Income Securities [Member] Fixed Income Securities [Member] Fixed Income Funds [Member] Fixed Income Funds [Member] Investments in Other Private Equity Funds [Member] Investments, Consolidated Sponsored Investment Products, Fair Value Disclosure Investments, Consolidated Sponsored Investment Products, Fair Value Disclosure Investments, Consolidated Sponsored Investment Products, Fair Value Disclosure Unfunded commitments Investments, Consolidated Sponsored Investment Products, Unfunded Commitments Investments, Consolidated Sponsored Investment Products, Unfunded Commitments Weighted average remaining term Investments, Consolidated Sponsored Investment Products, Weighted Average Remaining Term Investments, Consolidated Sponsored Investment Products, Weighted Average Remaining Term Redemption notice period Investments, Consolidated Sponsored Investment Products, Redemption Notice Period Investments, Consolidated Sponsored Investment Products, Redemption Notice Period General Discussion of Pension and Other Postretirement Benefits [Abstract] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Retirement Plans [Member] Retirement Plans [Member] Retirement Plans [Member] Medical Plans [Member] Medical Plans [Member] Medical Plans [Member] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return on Plan Assets Amortization of prior service cost/(credit) Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of net actuarial gain/(loss) Defined Benefit Plan, Amortization of Gains (Losses) Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure [Member] Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure [Member] Cash and cash equivalents of consolidated investment products Investments Of Consolidated Investment Products Assets Other liabilities of consolidated investment products Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Liabilities and Equity Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transactions, by Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Affiliated Entity [Member] Affiliated Entity [Member] Investment Advisory Fees Distribution and Servicing Fees Performance Fees Revenue, Other Financial Services Revenues Unsettled fund receivables Investments Separate Account Assets Discontinued Operations and Disposal Groups [Abstract] Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds Statement of Cash Flows [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Adjustments to reconcile net income to net cash provided by/(used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Amortization and depreciation Depreciation, Depletion and Amortization Share-based compensation expense Share-based Compensation (Gain)/loss on disposal of business, property and equipment, net Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Other (gains)/losses, net Other Noncash Income (Expense) Other (gains)/losses of CSIP, net Gains and losses of consolidated sponsored investment products net Gains and losses of consolidated sponsored investment products net Other (gains)/losses of CIP, net Equity in earnings of unconsolidated affiliates Dividends from unconsolidated affiliates Proceeds from Equity Method Investment, Dividends or Distributions Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] (Increase)/decrease in cash held by CIP Change in cash held at consolidated investment products The net change between the beginning and ending balance of the cash and cash equivalents held at the entity's consolidated investment products. (Increase)/decrease in cash held by CSIP Increase (Decrease) In Cash For Operating Activities, Consolidated Sponsored Investment Products Increase (Decrease) In Cash For Operating Activities, Consolidated Sponsored Investment Products (Purchase)/sale of trading investments, net Proceeds from (Payments for) Trading Securities, Short-term (Increase)/decrease in receivables Increase (Decrease) in Receivables Increase/(decrease) in payables Increase (Decrease) in Accounts Payable Net cash provided by/(used in) operating activities Net Cash Provided by (Used in) Operating Activities Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Purchase of available-for-sale investments Payments to Acquire Available-for-sale Securities Sale of available-for-sale investments Proceeds from Sale of Available-for-sale Securities Purchase of investments by CIP Purchase of investments by consolidated investment products Cash outflow associated with investments held by the entity's consolidated investment products. Sale of investments by CIP Proceeds from sale of investments by consolidated investment products Cash inflow associated with investments held by the entity's consolidated investment products. Purchase of investments by CSIP Payments To Acquire Investments, Consolidated Sponsored Investment Products Payments To Acquire Investments, Consolidated Sponsored Investment Products Sale of investments by CSIP Proceeds From Sale, Maturity And Collection Of Investments, Consolidated Sponsored Investment Products Proceeds From Sale, Maturity And Collection Of Investments, Consolidated Sponsored Investment Products Purchase of other investments Payments to Acquire Other Investments Sale of other investments Proceeds from Sale of Other Investments Returns of capital and distributions from unconsolidated partnership investments Proceeds from returns of capital and distributions from equity method investments Proceeds from returns of capital and distributions from equity method investments. Acquisition earn-out payments Payments for (Proceeds from) Previous Acquisition Sale of Business Proceeds from Divestiture of Businesses and Interests in Affiliates Net cash provided by/(used in) investing activities Net Cash Provided by (Used in) Investing Activities Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from exercises of share options Proceeds from Stock Options Exercised Purchases of treasury shares Payments for Repurchase of Common Stock Dividends paid Payments of Ordinary Dividends, Common Stock Excess tax benefits from share-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Repayment on unsettled fund account Proceeds from Overdraft on Unsettled Fund Account Proceeds from Overdraft on Unsettled Fund Account Third-party capital invested into CIP Capital invested into consolidated investment products The cash inflow from the capital received in cash from a partner in a partnership during the period. Third-party capital distributed by CIP Capital distributed by consolidated investment products The cash outflow from any dividend or other distribution in cash with respect to any shares of, or other ownership interest in, an entity, except a dividend consisting of distribution of earnings or stock dividend or pro rata stock split. Third-party capital invested into CSIP Payments Of Contributions To Affiliates, Consolidated Sponsored Investment Products Payments Of Contributions To Affiliates, Consolidated Sponsored Investment Products Proceeds From Distributions From Affiliates, Consolidated Sponsored Investment Products Proceeds From Distributions From Affiliates, Consolidated Sponsored Investment Products Proceeds From Distributions From Affiliates, Consolidated Sponsored Investment Products Borrowings of debt by CIP Proceeds from Debt, Consolidated Investment Products Proceeds from Debt, Consolidated Investment Products Repayments of debt by CIP Repayments of consolidated investment products Repayments of consolidated investment products. Net borrowings/(repayments) under credit facility Proceeds from (Repayments of) Lines of Credit Net cash provided by/(used in) financing activities Net Cash Provided by (Used in) Financing Activities Increase/(decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Foreign exchange movement on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Cash and cash equivalents, beginning of year Cash and cash equivalents, end of year Supplemental Cash Flow Information: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Net Interest received Proceeds from Interest Received Taxes paid Income Taxes Paid, Net Schedule Of Long-Term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Analysis Of Borrowings By Maturity Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Line of Credit Facilities [Table Text Block] Schedule of Line of Credit Facilities [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Undrawn capital and purchase commitments Undrawn Capital Commitments The company's investment may take the form of the general partner or a limited partner, and the entities are structured such that each partner makes capital commitments that may be drawn down over the life of the partnership as investment opportunities are identified. Global sales tax reversed Global Sales Tax Reversed Global Sales Tax Reversed Accounting Policies [Abstract] Basis of Accounting and Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Accounting Pronouncements Recently Adopted and Pending Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurement, Policy [Policy Text Block] SHARE CAPITAL Stockholders' Equity Note Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Asset Class [Axis] Asset Class [Axis] Fair Value by Asset Class [Domain] Asset Class [Domain] Other Debt Obligations [Member] Other Debt Obligations [Member] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Note Payable [Member] Note Payable [Member] Note Payable [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Returns of capital Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Return of Capital Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Return of Capital Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Instruments Classified in Shareholders' Equity, Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Instruments Classified in Shareholders' Equity, Settlements Net unrealized gains and losses included in other gains and losses Net unrealized gains and losses included in accumulated other comprehensive income/(loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Foreign exchange gains/(losses) Statement of Comprehensive Income [Abstract] Net income Other Comprehensive Income (Loss), before Tax [Abstract] Other Comprehensive Income (Loss), before Tax [Abstract] Currency translation differences on investments in foreign subsidiaries Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Actuarial (loss)/gain related to employee benefit plans Defined Benefit Plan, Actuarial Gain (Loss) Reclassification of amortization of prior service cost/(credit) into employee compensation expense Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax Reclassification of amortization of actuarial (gain)/loss into employee compensation expense Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax Share of other comprehensive income/(loss) of equity method investments Comprehensive Income Of Equity Method Investments Comprehensive Income Of Equity Method Investments Unrealized (losses)/gains on available-for-sale investments Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Reclassification of net (gains)/losses realized on available-for-sale investments included in other gains and losses, net Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other comprehensive income/(loss), before tax Other Comprehensive Income (Loss), before Tax Other Comprehensive Income (Loss), Tax [Abstract] Other Comprehensive Income (Loss), Tax [Abstract] Tax benefit/(expense) on foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Tax on actuarial (loss)/gain related to employee benefit plans Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, before Reclassification Adjustments, Tax Reclassification of tax on amortization of prior service cost/(credit) into income tax provision Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Tax Reclassification of tax on amortization of actuarial (gain)/loss into income tax provision Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Tax Tax on net unrealized (losses)/gains on available-for-sale investments Other Comprehensive Income (Loss), Available-for-sale Securities, Tax Reclassification of tax on net (gains)/losses realized on available-for-sale investments included in income tax provision Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Total income tax benefit/(expense) related to items of other comprehensive income Other Comprehensive Income (Loss), Tax Other comprehensive income/(loss), net of tax Other Comprehensive Income (Loss), Net of Tax Total comprehensive income/(loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive loss/(income) attributable to noncontrolling interests in consolidated entities Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to common shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Income Tax Disclosure [Abstract] Unrecognized Tax Benefits Unrecognized Tax Benefits Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions CLOs - VIEs [Member] CLOs - VIEs [Member] Represents financial statement information of CLO VIEs. Other VIEs [Member] Other VIEs [Member] Other VIEs [Member] VOEs [Member] VOEs [Member] VOEs [Member] Adjustments [Member] VIE Adjustments [Member] Vie Adjustments [Member] Impact of CIP [Member] Consolidated Investment Products [Member] Consolidated Investment Products [Member] Accounts receivable of CIP Accounts Receivable, Consolidated Investment Products, Net Accounts Receivable, Consolidated Investment Products, Net Total liabilities Other equity attributable to common shareholders Other Stockholders Equity Other Stockholders Equity Equity attributable to noncontrolling interests in consolidated entities Nonredeemable Noncontrolling Interest, Consolidated Investment Products Nonredeemable Noncontrolling Interest, Consolidated Investment Products RETIREMENT BENEFIT PLANS Pension and Other Postretirement Benefits Disclosure [Text Block] Movements In Shares Issued And Outstanding Schedule of Stock and Treasury Stock [Table Text Block] Schedule of Stock and Treasury Stock [Table Text Block] Common shares issued Shares, Issued Less: Treasury shares for which dividend and voting rights do not apply Treasury stock, shares for which dividend and voting rights do not apply Treasury stock, shares for which dividend and voting rights do not apply. Common shares outstanding Common Stock, Shares, Outstanding RELATED PARTIES Related Party Transactions Disclosure [Text Block] Fair Value, by Balance Sheet Grouping [Table] Carrying Value [Member] Reported Value Measurement [Member] Fair Value [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Available for sale investments Available-for-sale Securities Trading investments Trading Securities Foreign time deposits Foreign time deposits Any certificate of deposit or savings account held by a bank or other financial institution for a specified period of time. These Foreign time deposits are of a large denomination, have maturity dates of three months or longer, and are combined with marketable securities. Policyholder payables Financial instruments sold, not yet purchased Financial Instruments Sold, Not yet Purchased, Corporate Equities Note payable Notes Payable Long-term debt Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Unsecured Debt [Member] Unsecured Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Due November 30, 2022 [Member] Due November 30, 2022 [Member] Due November Three Zero Two Zero Two Two [Member] Due January 30, 2024 [Member] Senior Notes - Due January 30, 2024 [Member] Senior Notes - Due January 30, 2024 [Member] Due November 30, 2043 [Member] Senior Notes - Due November 30, 2043 [Member] Senior Notes - Due November 30, 2043 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Unsecured Senior Notes Long-term Debt, Fair Value Debt Instrument, Maturity Date Debt Instrument, Maturity Date Debt instrument, interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Face Amount Debt Instrument, Face Amount Debt Instrument, Issuer Debt Instrument, Issuer COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] CONSOLIDATED INVESTMENT PRODUCTS Consolidated Investment Products Disclosure [Text Block] This item represents the disclosure of the company's consolidated investment products, including: (1) investment products that are variable interest entities and the company is the primary beneficiary; (2) other partnership entities in which the company is the general partner and is considered to have control, in the absence of simple majority kick-out rights to remove the general partner, simple majority liquidation rights to dissolve the partnership, or any substantive participating rights of the other limited partners; and (3) investment products in which the company has a controlling financial interest. INVESTMENTS Investment [Text Block] Schedule of Discontinued Operations Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block] Maturities of Long-term Debt [Abstract] Long-term Debt, Maturities, Repayments of Principal after Year Five Long-term Debt, Maturities, Repayments of Principal after Year Five Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Noncontrolling Interests in Consolidated Entities [Member] Noncontrolling Interest [Member] Retained Earnings Appropriated For Investors In Consolidated Investment Products [Member] Retained Earnings Appropriated For Investors In Consolidated Investment Products [Member] Retained Earnings Appropriated for investors in Consolidated Investment Products [Member] Currency translation differences on investments in foreign subsidiaries Currency translation differences on investments in foreign subsidiaries reclassified to appropriated retained earnings Currency Translation Differences On Investments In Overseas Subsidiaries Reclassified To Appropriated Retained Earnings Currency translation differences on investments in overseas subsidiaries reclassified to appropriated retained earnings Accumulated Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Marketable Securities Marketable Securities [Table Text Block] Marketable Securities [Table Text Block] Realized Gains Losses Available-For-Sale Securities Schedule of Realized Gain (Loss) [Table Text Block] Gross Unrealized Holding Gains And Losses Recognized In Other Accumulated Comprehensive Income From Available-For-Sale Investments Available For Sale Securities Change In Net Unrealized Holding Gain Loss [Table Text Block] This item represents the change in net unrealized holding gain or loss on available-for-sale securities that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period. Breakdown Of Available-For-Sale Investments with Unrealized Losses Schedule Of Available For Sale Investments [Table Text Block] Schedule Of Available For Sale Investments [Table Text Block] ACCOUNTING POLICIES Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Schedule of defined benefit plans Schedule of Defined Benefit Plans Disclosures [Table Text Block] Schedule of Investments [Table] Schedule of Investments [Table] Investment Type [Axis] Investment Type [Axis] Investment Type Categorization [Domain] Investments [Domain] Private Equity Fund Of Funds [Member] Private Equity Fund Of Funds [Member] Private Equity Fund Of Funds [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Fair Value Investment Owned, at Fair Value Unfunded Commitments Fair Value, Investments, Unfunded Commitments Fair Value, Investments, Unfunded Commitments Weighted Average Remaining Term Private Equity Funds, Weighted Average Remaining Term Private Equity Funds, Weighted Average Remaining Term Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Foreign currency translation [Member] Accumulated Translation Adjustment [Member] Employee benefit plans [Member] Accumulated Defined Benefit Plans Adjustment [Member] Equity method investments [Member] Equity Method Investments [Member] Available-for-sale investments [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Other comprehensive income/(loss) before tax: Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Actuarial (loss)/gain related to employee benefit plans Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax Share of other comprehensive income/(loss) of equity method investments Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Including Portion Attributable to Noncontrolling Interest Unrealized(losses)/gains on available-for-sale investments Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Income tax related to items of other comprehensive income/(loss): Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] Tax on actuarial (loss)/gain related to employee benefit plans Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax Reclassification of tax on amortization of prior service cost/(credit) into income tax provision Reclassification of tax on amortization of actuarial (loss)/gain into income tax provision Tax on net unrealized gains/(losses) on available-for-sale investments Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Reclassification of tax on net (gains)/losses on available-for-sale investments Accumulated other comprehensive income/(loss), net of tax: Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Beginning balance Other comprehensive income/(loss), net of tax: Other comprehensive (income)/loss attributable to noncontrolling interests Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest Ending balance SUBSEQUENT EVENTS Subsequent Events [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Time Vested N y s e [Member] Time Vested N y s e [Member] Time Vested N Y S E [Member] Time-Vested [Member] Time-Vested [Member] Time-Vested [Member] Performance Shares [Member] Performance Shares [Member] Unvested at the beginning of year Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted during the year Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited during the year Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Vested and distributed during the year Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Unvested at the end of the year Unvested at beginning of year Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted during period Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Forfeited during the year Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Vested and distributed during the period Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Unvested at the end of the year Weighted Average Grant Date Fair Value Currency [Axis] Currency [Axis] All Currencies [Domain] All Currencies [Domain] United States of America, Dollars United States of America, Dollars United Kingdom, Pounds United Kingdom, Pounds Movements Of Share Awards Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Changes In Share Options Awards Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] SHARE-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Income from continuing operations attributable to Invesco Ltd. for basic and diluted EPS calculations Income (Loss) from Continuing Operations Attributable to Parent Weighted average shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Dilutive effect on share-based awards (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Basic earnings per share: Diluted earnings per share: Proceeds from Sales Gross Realized Gains Available-for-sale Securities, Gross Realized Gains Gross Realized Losses Available-for-sale Securities, Gross Realized Losses Statement of Stockholders' Equity [Abstract] Common Shares [Member] Common Stock [Member] Additional Paid-In-Capital [Member] Additional Paid-in Capital [Member] Treasury Shares [Member] Treasury Stock [Member] Retained Earnings [Member] Retained Earnings [Member] Retained Earnings Appropriated for Investors in CIP [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Total Equity Attributable to Common Shareholders [Member] Parent [Member] Nonredeemable Noncontrolling Interests in Consolidated Entities [Member] Redeemable noncontrolling interest [Member] Redeemable noncontrolling interest [Member] Redeemable noncontrolling interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance Net income Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Other comprehensive income (loss) Net income/(loss) reclassified to appropriated retained earnings Net Income Reclassified To Appropriated Retained Earnings Net income reclassified to appropriated retained earnings Deconsolidation of CIP Deconsolidation of consolidated investment products Deconsolidation of consolidated investment products Change in noncontrolling interests in consolidated entities, net Change in Noncontrolling Interests in Consolidated Entities, Net Increase or decrease in noncontrolling interest balance from receipt of contributions or payment of dividends or other distributions to noncontrolling interest shareholders. Dividends Dividends, Common Stock, Cash Employee share plans: Employee share plans Abstract Employee share plans: Share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Vested shares Vested shares Recognition of treasury shares as outstanding upon the vesting of share-based payment awards granted to employees that are in the form of restricted stock awards and restricted share units. Exercise of options Stock Issued During Period, Value, Stock Options Exercised Tax impact of share-based payment Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Purchase of shares Treasury Stock, Value, Acquired, Cost Method Ending balance Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Beginning Balance Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests Net income Temporary Equity, Net Income Change in noncontrolling interests in consolidated entities, net Temporary Equity, Stock Issued During Period, Value, New Issues Ending Balance Document Information [Abstract] Document Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Contribution Plan, Cost Recognized Defined Contribution Plan, Cost Recognized Other Postretirement Benefits Payable Other Postretirement Benefits Payable Estimated amounts of contributions expected to be paid to the plans in next fiscal year Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year Pension Contributions Pension Contributions Balances Related To CIP Balances Related To Consolidated Investment Products [Table Text Block] Balances Related To Consolidated Investment Products [Table Text Block] Company's Maximum Risk Of Loss In Significant VIE's Schedule of Variable Interest Entities [Table Text Block] VIE Balance Sheets Consolidated In Period VIE Balance Sheets Consolidated in Period [Table Text Block] VIE Balance Sheets Consolidated in Period [Table Text Block] Balance Sheets Deconsolidated in Period [Table Text Block] Balance Sheets Deconsolidated in Period [Table Text Block] Balance Sheets Deconsolidated in Period [Table Text Block] Condensed Consolidating Balance Sheet [Table Text Block] Condensed Consolidating Balance Sheet [Table Text Block] Condensed Consolidating Balance Sheet [Table Text Block] Condensed Consolidating Statement Of Income Line Items Reflecting Impact Of Consolidation Of Investment Products Into The Condensed Consolidated Statements Of Income Condensed Consolidating Statement of Income [Table Text Block] Condensed Consolidating Statement of Income [Table Text Block] Fair Value Hierarchy Levels Of Investments Held And Notes Issued By Consolidated Investment Products Fair Value Hierarchy Levels Of Investments Held And Notes Issued By Consolidated Investment Products [Table Text Block] Fair Value Hierarchy Levels Of Investments Held And Notes Issued By Consolidated Investment Products [Table Text Block] Beginning And Ending Fair Value Measurements For Level 3 Assets And Liabilities Beginning and Ending Fair Value Measurements for Level Three Assets and Liabilities [Table Text Block] Beginning and Ending Fair Value Measurements for Level Three Assets and Liabilities [Table Text Block] Fair Value Inputs, Assets and Liabilities, Quantitative Information, Consolidated Investment Products Fair Value Inputs, Assets and Liabilities, Quantitative Information, Consolidated Investment Products [Table Text Block] Fair Value Inputs, Assets and Liabilities, Quantitative Information, Consolidated Investment Products [Table Text Block] OTHER COMPREHENSIVE INCOME/(LOSS) Comprehensive Income (Loss) Note [Text Block] Total operating revenues Total operating expenses Income from continuing operations, net of income taxes (Gains)/losses attributable to noncontrolling interests in consolidated entities, net Calculation Of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Seed Money Funds [Member] Seed Money Funds [Member] Seed Money Funds [Member] Less Than 12 Months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less than 12 Months, Gross Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. 12 Months or Greater, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12 Months or Greater, Gross Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. Total, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Total, Gross Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. Beginning balance (Asset) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) Purchases Sales Gains and losses included in the Condensed Consolidated Statements of Income Balances Related To CSIP Schedule Of Consolidated Sponsored Investment Products, Balance Sheet Disclosures [Table Text Block] Schedule Of Consolidated Sponsored Investment Products, Balance Sheet Disclosures [Table Text Block] Fair Value Hierarchy Levels Of Investments Held By CSIP Fair Value Hierarchy Levels Of Investments Held By Consolidated Sponsored Investment Products [Table Text Block] Fair Value Hierarchy Levels Of Investments Held By Consolidated Sponsored Investment Products [Table Text Block] Reconciliation of Significant Unobservable Inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] CONSOLIDATED SPONSORED INVESTMENT PRODUCTS Consolidated Sponsored Investment Products Disclosure [Text Block] Consolidated Sponsored Investment Products Disclosure [Text Block] Seed Money [Member] Cost Available-for-sale Securities, Amortized Cost Basis Gross Unrealized Holding Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. Gross Unrealized Holding Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. Fair Value Income (loss) from discontinued operations before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Income tax (provision)/benefit Discontinued Operation, Tax Effect of Discontinued Operation Income (loss) from discontinued operations, net of tax Less: Debt of CIP Less: Other liabilities of CIP Less: Retained earnings retained earnings adjustment for CIP retained earnings adjustment for CIP Less: Retained earnings appropriated for investors in CIP Less: Accumulated other comprehensive income, net of tax CIP adjustment to accumulated other comprehensive income, net of tax CIP adjustment to accumulated other comprehensive income, net of tax Less: Equity attributable to nonredeemable noncontrolling interests Invesco's net interests in CIP Net Interests In Consolidated Investment Products Net Interests In Consolidated Investment Products Invesco's net economic interests as a percentage of investments of CIP Net Interests As A Percentage Of Investments Of Consolidated Investment Products Net Interests As A Percentage Of Investments Of Consolidated Investment Products DISCONTINUED OPERATIONS Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] FAIR VALUE OF ASSETS AND LIABILITIES Fair Value Disclosures [Text Block] Fair Value By Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Tri-Level Hierarchy, Carrying Value Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Reconciliation of Balance, Fair Value Measurement, Level 3 Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block] Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block] Investment Holdings [Table] Deferred Compensation Arrangements [Member] Deferred compensation arrangements [Member] Other equity investments [Member] UIT-Related Equity And Debt Securities [Member] UIT-Related Equity And Debt Securities [Member] Investment Holdings [Line Items] Equity method investments Equity Method Investments Cost Method Investments Cost Method Investments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value by Liability Class [Axis] Future [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Number of futures contracts (as shown) Number Of Futures Contracts Number Of Futures Contracts Notional value of futures contracts Derivative, Notional Amount Other debt securities other debt securities other debt securities Note payable Notes Payable, Fair Value Disclosure Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] New CLO [Member] New CLO [Member] New CLO [Member] Total equity Money market funds Money Market Funds, at Carrying Value Seed money Seed money Seed money investments are investments held in managed funds with the purpose of providing capital to the funds during their development periods. These investments are recorded at fair value using quoted market prices in active markets. CLOs Collateralized Loan Obligations Collateralized loan Obligations (CLOs) are investment vehicles created for the sole purpose of issuing collateralized loan instruments that offer investors the opportunity for returns that vary with the risk level of their investment. The notes issued by the CLOs are backed by diversified collateral asset portfolios consisting primarily of loans or structured debt. Investments related to deferred compensation plans Deferred Compensation Plan Assets Trading Securities, Equity Trading Securities, Equity Corporate Stock Corporate Stock Corporate Stock UITs U I T U I T Municipal securities Municipal Debt Securities, at Carrying Value Total Assets, Fair Value Disclosure Corporate equities Corporate Equities Corporate Equities Note payable Total Financial and Nonfinancial Liabilities, Fair Value Disclosure Cost method investments Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued TAXATION Income Tax Disclosure [Text Block] Global Equity Incentive Plan, 2011 [Member] Global Equity Incentive Plan, 2011 [Member] Global Equity Incentive Plan, 2011 [Member] Global Equity Incentive Plan, 2010 [Member] Global Equity Incentive Plan, 2010 [Member] Global Equity Incentive Plan, 2010 [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Proportional vesting rate Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Shares authorized under share awards plan Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Proceeds from Stock Options Exercised Number of Share Awards By Type Number of Share Awards By Type Number of Share Awards By Type Fair value of vested shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Weighted average fair value of shares granted Unrecognized compensation cost related to non-vested shares Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average non-vested shares compensation cost expected to recognize Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition ESPP discount rate Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date Maximum employee ESPP contributions per offering period Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate, Amount Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate, Amount recognized expense for employee stock purchase recognized expense for employee stock purchase recognized expense for employee stock purchase Bank Loans [Member] Corporate Debt Securities [Member] Bonds [Member] Corporate Bond Securities [Member] Debt Securities [Member] Debt Securities [Member] US Treasury Notes Securities [Member] US Treasury Notes Securities [Member] CLO Collateral Assets CLO Collateral Assets Clo Collateral Assets CLO notes Total liabilities at fair value EARNINGS PER SHARE Earnings Per Share [Text Block]