Consolidating Guarantor Financial Information [Abstract] Schedule of Consolidating Statement of Operations Condensed Income Statement [Table Text Block] Schedule of Consolidating Statements of Comprehensive Income (Loss) Condensed Statement of Comprehensive Income [Table Text Block] Schedule of Consolidating Balance Sheet Condensed Balance Sheet [Table Text Block] Schedule of Consolidating Statement of Cash Flows Condensed Cash Flow Statement [Table Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument, Name [Domain] Term C-2 Loan Facility [Member] Term C-2 Loan Facility [Member] Term C-2 Loan Facility [Member]. Term C-3 Loan Facility [Member] Term C-3 Loan Facility [Member] Term C-3 Loan Facility [Member] Senior Unsecured Notes Due 2018 [Member] Senior Unsecured Notes Due 2018 [Member] 6.625% Senior Unsecured Notes Due 2018 [Member]. Senior Unsecured Notes Due 2019 [Member] Senior Unsecured Notes Due 2019 [Member] 3.250% Senior Unsecured Notes Due 2019 [Member] Senior Unsecured Notes Due 2021 [Member] Senior Unsecured Notes Due 2021 [Member] 5.875% Senior Unsecured Notes Due 2021 [Member]. Senior Unsecured Notes Due 2022 [Member] Senior Unsecured Notes Due 2022 [Member] Senior Unsecured Notes Due 2022 [Member]. Pollution Control and Industrial Revenue Bonds [Member] Pollution Control and Industrial Revenue Bonds [Member] Pollution Control and Industrial Revenue Bonds [Member]. Obligations Under Capital Leases [Member] Capital Lease Obligations [Member] Debt Instrument [Line Items] Long-Term Debt Long-term Debt and Capital Lease Obligations [Abstract] Credit facility Long-term Line of Credit Senior credit facilities - Term loans Secured Debt Senior unsecured notes Unsecured Debt Date of maturity Debt Instrument, Maturity Date Interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage Credit facility, expiration date Line of Credit Facility, Expiration Date Other long-term debt Other Long-term Debt Interest rate, stated percentage range, minimum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Interest rate, stated percentage range, maximum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum Year of maturity, range end Debt Instrument, Maturity Date Range, End Capital lease obligations Capital Lease Obligations, Noncurrent Subtotal Long-term Debt Current installments of long-term debt Long-term Debt, Current Maturities Total Long-term Debt, Excluding Current Maturities Compensation and Retirement Disclosure [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Cash Contributions to Defined Benefit Pension Plans [Member] Pension Plan [Member] Other Pension Plan [Member] Other Pension Plan [Member] Benefit Payments to Other Postretirement Benefit Plans [Member] Other Postretirement Benefit Plan [Member] Defined Benefit Plan Disclosure [Line Items] Total contributions year-to-date Defined Benefit Plan, Contributions by Employer Total expected contributions in current fiscal year Defined Benefit Plan, Expected Contributions in Current Fiscal Year Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Fair Value Disclosures [Abstract] Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Carrying Values and Fair Values of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Description of the Company and Basis of Presentation Business Description and Basis of Presentation [Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Debt Instrument [Axis] Debt Instrument, Name [Domain] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Net Investment Hedging [Member] Net Investment Hedging [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Marketable securities, at fair value [Member] Available-for-sale Securities [Member] Noncurrent Other assets [Member] Other Noncurrent Assets [Member] Current Other Assets [Member] Other Current Assets [Member] Noncurrent Other liabilities [Member] Other Noncurrent Liabilities [Member] Long-term Debt [Member] Long-term Debt [Member] Current Other liabilities [Member] Other Current Liabilities [Member] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Hedging Designation [Axis] Hedging Designation [Domain] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] 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] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Mutual funds Available-for-sale Securities, Current Cross-currency swaps Foreign Currency Cash Flow Hedge Asset at Fair Value Foreign currency forwards and swaps Foreign Currency Contract, Asset, Fair Value Disclosure Total assets Assets, Fair Value Disclosure Interest rate swaps Interest Rate Cash Flow Hedge Liability at Fair Value Cross-currency swaps Foreign Currency Cash Flow Hedge Liability at Fair Value 3.250% Notes Hedging Liabilities, Noncurrent Foreign currency forwards and swaps Foreign Currency Contracts, Liability, Fair Value Disclosure Interest rate swaps Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Stockholders' Equity Note [Abstract] Schedule of Dividend Increases [Table] Schedule of Dividend Increases [Table]. Period [Axis] Period [Axis] Period [Axis] includes, for example, Quarterly [Member] and Annual [Member]. Period [Domain] Period [Domain] Period [Domain]. Quarterly [Member] Quarterly [Member] Quarterly [Member]. Annual [Member] Annual [Member] Annual [Member]. Schedule of Dividend Increases [Line Items] [Line Items] for Schedule of Dividend Increases [Table]. Common stock, dividends, rate increase, percent Common Stock, Dividends, Rate Increase, Percent Common Stock, Dividends, Rate Increase, Percent. Common stock, dividends, per share, declared Common Stock, Dividends, Per Share, Declared Inventory Disclosure [Abstract] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Hedging Designation [Axis] Hedging Designation [Domain] Derivative Instrument [Axis] Derivative Contract [Domain] Interest Rate Swap [Member] Interest Rate Swap [Member] Cross Currency Interest Rate Contract [Member] Cross Currency Interest Rate Contract [Member] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Swap Derivative 1 Point 71 Percent Maturing January 2, 2014 [Member] Swap Derivative 1 Point 71 Percent Maturing January 2, 2014 [Member] 1.71% Swap Derivative Maturing January 2, 2014 [Member]. Swap Derivative 1 Point 02 Percent Maturing January 2, 2016 [Member] Swap Derivative 1 Point 02 Percent Maturing January 2, 2016 [Member] Swap Derivative 1 Point 02 Percent Maturing January 2, 2016 [Member]. Derivative [Line Items] Derivative [Line Items] Effective Date Derivative, Inception Date Expiration Date Derivative, Maturity Date Fixed Rate Derivative, Fixed Interest Rate Notional Value Derivative, Notional Amount Commitments and Contingencies Disclosure [Abstract] Unrecorded unconditional purchase obligations Unrecorded Unconditional Purchase Obligation Term of unrecorded unconditional purchase obligations Term of Unrecorded Unconditional Purchase Obligation Document And Entity Information [Abstract] Document And Entity 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 Entity Current Reporting Status Entity Current Reporting Status Foreign Exchange Contract [Member] Fair Value Measurements Fair Value Disclosures [Text Block] Pension Benefits [Member] Postretirement Benefits [Member] 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), net Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Total Defined Benefit Plan, Net Periodic Benefit Cost Derivative Liabilities [Abstract] Derivative Liability [Abstract] Gross amount recognized Derivative Liability, Fair Value, Gross Liability Gross amount offset in the consolidated balance sheets Derivative Liability, Fair Value, Gross Asset Net amount presented in the consolidated balance sheets Derivative Liability, Fair Value, Amount Not Offset Against Collateral Gross amount not offset in the consolidated balance sheets Derivative Liability, Collateral, Right to Reclaim Cash, Offset Net amount Derivative Liability Revolving Credit Facility [Member] Revolving Credit Facility [Member] Accounts Receivable Securitization Facility [Member] AccountsReceivableSecuritizationFacility [Member] An accounts receivable securitization facility which allows a wholly owned, bankruptcy-remote subsididary to sell an undivided interest in a pool of trade receivables (received through contribution from certain subsidiaries that retain the responsibility of servicing the receivables) to financial institutions participating in the facility. Borrowings outstanding Borrowings outstanding Line of Credit, Current Letters of credit issued Letters of Credit Outstanding, Amount Available for borrowing Line of Credit Facility, Remaining Borrowing Capacity Statement of Stockholders' Equity [Abstract] Statement [Table] Equity Components [Axis] Equity Component [Domain] Total Celanese Corporation Stockholders' Equity [Member] Parent [Member] Series A Common Stock [Member] Common Stock [Member] Treasury Stock [Member] Treasury Stock [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income (Loss) [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Statement [Line Items] Balance as of the beginning of the period, shares Shares, Issued Balance as of the beginning of the period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Stock option exercises, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock option exercises, net of tax Stock Issued During Period, Value, Stock Options Exercised Purchases of treasury stock, shares Stockholders' Equity, Other Shares Purchases of treasury stock, including related fees Stockholders' Equity, Other Stock awards, shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Stock awards Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Purchases of treasury stock, shares Treasury Stock, Shares, Acquired Purchases of treasury stock, including related fees Treasury Stock, Value, Acquired, Cost Method Stock-based compensation, net of tax Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Net earnings (loss) attributable to Celanese Corporation Net Income (Loss) Attributable to Parent Series A common stock dividends Dividends, Common Stock Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Total Celanese Corporation stockholders' equity Stockholders' Equity Attributable to Parent Net earnings (loss) attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Contributions from noncontrolling interests Noncontrolling Interest, Increase from Subsidiary Equity Issuance Balance as of the end of the period, shares Balance as of the end of the period Income Statement [Abstract] Scenario [Axis] Scenario, Unspecified [Domain] Net sales Revenue, Net Cost of sales Cost of Goods and Services Sold Gross profit Gross Profit Selling, general and administrative expenses Selling, General and Administrative Expense Amortization of intangible assets Amortization of Intangible Assets Research and development expenses Research and Development Expense Other (charges) gains, net Other (Charges) Gains, Net Other (charges) gains, net. Foreign exchange gain (loss), net Foreign Currency Transaction Gain (Loss), before Tax Gain (loss) on disposition of businesses and assets, net Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Operating profit (loss) Operating Income (Loss) Equity in net earnings (loss) of affiliates Income (Loss) from Equity Method Investments Interest expense Interest Expense Refinancing expense Write off of Deferred Debt Issuance Cost Interest income Investment Income, Interest Dividend income - cost investments Investment Income, Dividend Other income (expense), net Other Nonoperating Income (Expense) Earnings (loss) from continuing operations before tax Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax (provision) benefit Income Tax Expense (Benefit) Earnings (loss) from continuing operations Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Earnings (loss) from operation of discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Gain (loss) on disposition of discontinued operations Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Income tax (provision) benefit from discontinued operations Discontinued Operation, Tax Effect of Discontinued Operation Earnings (loss) from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net earnings (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net (earnings) loss attributable to noncontrolling interests Net earnings (loss) attributable to Celanese Corporation Amounts attributable to Celanese Corporation Income Amounts Attributable to Parent, Disclosures [Abstract] Earnings (loss) from continuing operations Income (Loss) from Continuing Operations Attributable to Parent Earnings (loss) from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Net earnings (loss) Earnings (loss) per common share - basic Earnings Per Share, Basic [Abstract] Continuing operations Income (Loss) from Continuing Operations, Per Basic Share Discontinued operations Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Net earnings (loss) - basic Earnings Per Share, Basic Earnings (loss) per common share - diluted Earnings Per Share, Diluted [Abstract] Continuing operations Income (Loss) from Continuing Operations, Per Diluted Share Discontinued operations Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Net earnings (loss) - diluted Earnings Per Share, Diluted Weighted average shares - basic Weighted Average Number of Shares Outstanding, Basic Weighted average shares - diluted Weighted Average Number of Shares Outstanding, Diluted Other Liabilities, Current [Abstract] Schedule of Current Other Liabilities Other Current Liabilities [Table Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Class of Stock [Line Items] Class of Stock [Line Items] Common stock, par value Common Stock, Par or Stated Value Per Share Schedule of Net Periodic Benefit Costs Recognized Schedule of Net Benefit Costs [Table Text Block] Schedule of Company Commitments to Fund Benefit Obligations Schedule of Company Commitments to Fund Benefit Obligations [Table Text Block] Schedule of Company Commitments to Fund Benefit Obligations [Table Text Block]. Restructuring and Related Activities [Abstract] Employee termination benefits OneTimeTerminationBenefits The charge against earnings in the period for known and estimated costs of one time termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan. Kelsterbach plant relocation Plant Relocation Costs Expensed Plant Relocation Costs Expensed. Asset impairments Asset Impairment Charges Plant/office closures Plant Office Closures Plant office closures. Commercial disputes Resolution of commercial disputes Resolution of commercial disputes. Other Other (Charges) Gains, Net Other Other (Charges) Gains, Net Other. Total Unrecognized Tax Benefits, Period Increase (Decrease) Unrecognized Tax Benefits, Period Increase (Decrease) Decrease in uncertain tax positions New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation Other Liabilities, Noncurrent [Abstract] Schedule of Noncurrent Other Liabilities Other Noncurrent Liabilities [Table Text Block] Schedule of Restructuring and Related Costs [Table] Segments [Axis] Segments [Domain] Advanced Engineered Materials [Member] Advanced Engineered Materials [Member] Advanced Engineered Materials [Member]. Consumer Specialties [Member] Consumer Specialties [Member] Consumer Specialties [Member]. Industrial Specialties [Member] Industrial Specialties [Member] Industrial Specialties [Member]. Acetyl Intermediates [Member] Acetyl Intermediates [Member] Acetyl Intermediates [Member]. Other [Member] Corporate and Other [Member] Restructuring Type [Axis] Type of Restructuring [Domain] Contract Termination [Member] Contract Termination [Member] Employee Termination Benefits [Member] Employee Severance [Member] Plant/Office Closures [Member] Facility Closing [Member] Restructuring Cost and Reserve [Line Items] As of December 31, 2013 Restructuring Reserve Additions Restructuring Charges Cash payments Payments for Restructuring Other changes Restructuring Reserve, Accrual Adjustment Exchange rate changes Restructuring Reserve, Translation Adjustment As of September 30, 2014 Total Asset retirement obligations Asset Retirement Obligations, Noncurrent Deferred proceeds Other Deferred Credits, Noncurrent Deferred revenue Deferred Revenue, Noncurrent Derivatives (Note 15) Derivative Liability, Noncurrent Environmental (Note 11) Accrued Environmental Loss Contingencies, Noncurrent Income taxes payable Accrued Income Taxes, Noncurrent Insurance Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount Restructuring (Note 13) Restructuring Reserve, Noncurrent Other Other Sundry Liabilities, Noncurrent Total Other Liabilities, Noncurrent Issuer and subsidiary guarantors, ownership percentage Equity Method Investments Ownership Percentage of Subsidiary Equity Method Investments Ownership Percentage of Subsidiary. Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Derivative Instrument [Axis] Derivative Contract [Domain] Equity Method Investments' Derivative [Member] Equity Method Investments' Derivative [Member] Equity Method Investments' Derivative [Member]. Unrealized Gain (Loss) on Marketable Securities [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member] Foreign Currency Translation [Member] Accumulated Translation Adjustment [Member] Gain (Loss) from Cash Flow Hedges [Member] Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] Pension and Postretirement Benefits [Member] Accumulated Defined Benefit Plans Adjustment [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] As of December 31, 2013 Accumulated Other Comprehensive Income (Loss), Net of Tax Other comprehensive income before reclassifications Other Comprehensive Income (Loss), before Reclassifications, before Tax Amounts reclassified from accumulated other comprehensive income (loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Income tax (provision) benefit Other Comprehensive Income (Loss), Tax As of September 30, 2014 Other Comprehensive Income (Loss), Net of Tax Portion Attributable To Equity Method Investee Other Comprehensive Income (Loss), Net of Tax Portion Attributable To Equity Method Investee Other Comprehensive Income (Loss), Net of Tax Portion Attributable To Equity Method Investee. Current Other Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingencies by Nature of Contingency [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Commercial Actions [Member] Other Commercial Actions [Member] Other Commercial Actions [Member]. Loss Contingencies [Line Items] Loss Contingencies [Line Items] Damages sought, amount Loss Contingency, Damages Sought, Value Other (Charges) Gains, Net Other (Charges) Gains, Net [Text Block] Other (Charges) Gains, Net [Text Block]. Asset retirement obligations Asset Retirement Obligation, Current Current portion of benefit obligations Postemployment Benefits Liability, Current Customer rebates Accrued Marketing Costs, Current Derivatives (Note 15) Derivative Liability, Current Environmental (Note 11) Accrued Environmental Loss Contingencies, Current Insurance Liability for Unpaid Claims and Claims Adjustment Expense, Reported Claims, Amount Interest Interest Payable, Current Restructuring (Note 13) Restructuring Reserve, Current Salaries and benefits Employee-related Liabilities, Current Sales and use tax/foreign withholding tax payable Sales and Excise Tax Payable, Current Uncertain tax positions Liability for Uncertain Tax Positions, Current Other Other Sundry Liabilities, Current Total Other Liabilities, Current Currency Swap [Member] Swap Derivative 4 Point 27 Percent Maturing September 11, 2020 [Member] Swap Derivative 4 Point 27 Percent Maturing September 11, 2020 [Member] Swap Derivative 4 Point 27 Percent Maturing September 11, 2020 [Member] Swap Derivative 2 Point 63 Percent Maturing September 11, 2020 [Member] Swap Derivative 2 Point 63 Percent Maturing September 11, 2020 [Member] Swap Derivative 2 Point 63 Percent Maturing September 11, 2020 [Member] Swap Derivative 3 Point 62 Percent Maturing April 17, 2019 [Member] Swap Derivative 3 Point 62 Percent Maturing April 17, 2019 [Member] Swap Derivative 3 Point 62 Percent Maturing April 17, 2019 [Member] Swap Derivative 2 Point 77 Percent Maturing April 17, 2019 [Member] Swap Derivative 2 Point 77 Percent Maturing April 17, 2019 [Member] Swap Derivative 2 Point 77 Percent Maturing April 17, 2019 [Member] Earnings Per Share [Abstract] Dilutive stock options Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Dilutive restricted stock units Incremental Common Shares Attributable to Restricted Stock Units Incremental Common Shares Attributable to Restricted Stock Units. Weighted average shares - diluted Environmental Remediation Obligations [Abstract] Environmental Environmental Loss Contingency Disclosure [Text Block] Schedule of Other (Charges) Gains, Net Schedule of Other (Charges) Gains, Net [Table Text Block] Schedule of Other (Charges) Gains, Net [Table Text Block]. Schedule of Restructuring Reserves Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Statement of Financial Position [Abstract] Legal Entity [Axis] Entity [Domain] Variable Interest Entity, Primary Beneficiary [Member] Series A common stock, $0.0001 par value, 400,000,000 shares authorized (2014: 166,075,904 issued and 153,632,466 outstanding; 2013: 165,867,965 issued and 156,939,828 outstanding) Common Class A [Member] Series B common stock, $0.0001 par value, 100,000,000 shares authorized (2014 and 2013: 0 issued and outstanding) Common Class B [Member] ASSETS Assets [Abstract] Current Assets Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Allowance for doubtful accounts - trade receivables Allowance for Doubtful Accounts Receivable, Current Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, plant and equipment Property, Plant and Equipment, Net Other assets Other Assets, Noncurrent Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Stockholders' Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Treasury stock, shares Treasury Stock, Shares Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Ventures and Variable Interest Entities [Abstract] Ventures and Variable Interest Entities [Abstract] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] InfraServ Gmbh & Co. Hoechst KG [Member] InfraServ Gmbh & Co. Hoechst KG [Member] InfraServ Gmbh & Co. Hoechst KG [Member]. Segments [Axis] Segments [Domain] Other Activities [Member] Cash [Member] Property, Plant and Equipment [Member] Variable Interest Entity [Line Items] Gains (Losses) on Restructuring of Debt Gains (Losses) on Restructuring of Debt Ownership percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Expected production capacity per year Expected Production Capacity Per Year Expected production capacity per year, upon completion of Methanol facility. Pre-formation costs Pre-formation Costs Receivable Pre-formation Costs Receivable. Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Legal Entity [Axis] Entity [Domain] Variable Interest Entity, Not Primary Beneficiary [Member] Variable Interest Entity, Not Primary Beneficiary [Member] Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Total assets Assets Trade payables Accounts Payable, Current Current installments of long-term debt Capital Lease Obligations, Current Current liabilities Liabilities, Current Long-term debt Total liabilities Liabilities Maximum exposure to loss Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Segment Reporting [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Schedule of Effective Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Debt Debt Disclosure [Text Block] Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Income Statement Location [Axis] Income Statement and Other Comprehensive Income (Loss) Location [Domain] Income Statement Location [Domain] Interest Expense [Member] Interest Expense [Member] Other Income [Member] Other Income [Member] Foreign Currency Gain (Loss) [Member] Foreign Currency Gain (Loss) [Member] Gain (Loss) Recognized in Other Comprehensive Income (Loss) Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Gain (Loss) Recognized in Earnings (Loss) Derivative, Gain (Loss) on Derivative, Net Gain (Loss) Recognized in Other Comprehensive Income (Loss) Gain (Loss) On Non-Derivative Used In Net Investment Hedge Adjustment in other comprehensive income reflecting gains or losses on foreign currency transactions that are designated as, and are effective as, hedges of net investment in foreign entity, gross of tax effect. Gain (Loss) Recognized in Earnings (Loss) Amount of Ineffectiveness on Net Investment Hedges Tax expense recognized in Other comprehensive income (loss) Earnings (Loss) Per Share Earnings Per Share [Text Block] Unrealized gain (loss) on marketable securities, gross amount Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Unrealized gain (loss) on marketable securities, income tax (provision) benefit Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Unrealized gain (loss) on marketable securities, net amount Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Foreign currency translation, gross amount Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Foreign currency translation, income tax (provision) benefit Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Foreign currency translation, net amount Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Gain (loss) from cash flow hedges, gross amount Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Gain (loss) from cash flow hedges, income tax (provision) benefit Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Gain (loss) from cash flow hedges, net amount Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Pension and postretirement benefits, gross amount Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax Pension and postretirement benefits, income tax (provision) benefit Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax Pension and postretirement benefits, net amount Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Total other comprehensive income (loss), gross amount Other Comprehensive Income (Loss), before Tax Total other comprehensive income (loss), income tax (provision) benefit Total other comprehensive income (loss), net of tax Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Short-term Debt [Line Items] Short-term Debt [Line Items] Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates Debt, Current [Abstract] Current installments of long-term debt Short-term borrowings, including amounts due to affiliates(1) Other Short-term Borrowings Accounts receivable securitization facility(2) Total Debt, Current Weighted average interest rate, short-term borrowings Short-term Debt, Weighted Average Interest Rate Weighted average interest rate, credit facility Line of Credit Facility, Interest Rate at Period End Schedule of Dividend Increases Schedule of Dividend Increases [Table Text Block] [Table Text Block] for Schedule of Dividend Increases [Table]. Schedule of Treasury Stock Class of Treasury Stock [Table Text Block] Schedule of Components of Other Comprehensive Income (Loss), Net Comprehensive Income (Loss) [Table Text Block] Schedule of Adjustments to Accumulated Other Comprehensive Income (Loss), Net Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Condensed Financial Statements [Table] Condensed Financial Statements [Table] Parent Guarantor [Member] Parent Company [Member] Issuer [Member] Subsidiary Issuer [Member] Subsidiary Guarantors [Member] Guarantor Subsidiaries [Member] Non-Guarantors [Member] Non-Guarantor Subsidiaries [Member] Eliminations [Member] Consolidation, Eliminations [Member] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Net earnings (loss) Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gain (loss) on marketable securities Foreign currency translation Gain (loss) from cash flow hedges Pension and postretirement benefits Total comprehensive income (loss), net of tax Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive (income) loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to Celanese Corporation Comprehensive Income (Loss), Net of Tax, Attributable to Parent Statement of Cash Flows [Abstract] Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net earnings (loss) to net cash provided by operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Asset impairments Depreciation, amortization and accretion Depreciation, Amortization and Accretion, Net Pension and postretirement net periodic benefit cost Pension and Other Postretirement Benefit Expense Pension and postretirement contributions Pension and Other Postretirement Benefit Contributions Deferred income taxes, net Deferred Income Tax Expense (Benefit) (Gain) loss on disposition of businesses and assets, net Gain (Loss) on Disposition of Property Plant Equipment Stock-based compensation Share-based Compensation Undistributed earnings in unconsolidated affiliates Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Other, net Other Operating Activities, Cash Flow Statement Operating cash provided by (used in) discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Changes in operating assets and liabilities Increase (Decrease) in Operating Capital [Abstract] Trade receivables - third party and affiliates, net Increase (Decrease) in Receivables Inventories Increase (Decrease) in Inventories Other assets Increase (Decrease) in Other Operating Assets Trade payables - third party and affiliates Increase (Decrease) in Accounts Payable Other liabilities Increase (Decrease) in Other Operating Liabilities 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] Capital expenditures on property, plant and equipment Payments to Acquire Property, Plant, and Equipment Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Capital expenditures related to Kelsterbach plant relocation Capital Expenditures Related to Plant Relocation Capital Expenditures Related to Plant Relocation. Capital expenditures related to Fairway Methanol LLC Capital Expenditures Related To Ventures Capital Expenditures Related To Ventures. Other, net Payments for (Proceeds from) Other Investing Activities 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] Short-term borrowings (repayments), net Proceeds from (Repayments of) Short-term Debt Proceeds from short-term debt Proceeds from Short-term Debt Repayments of short-term debt Repayments of Short-term Debt Proceeds from long-term debt Proceeds from Issuance of Long-term Debt Repayments of long-term debt Repayments of Long-term Debt Purchases of treasury stock, including related fees Payments for Repurchase of Common Stock Stock option exercises Proceeds from Stock Options Exercised Series A common stock dividends Payments of Ordinary Dividends, Common Stock Contributions from noncontrolling interests Proceeds from Noncontrolling Interests Other, net Proceeds from (Payments for) Other Financing Activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Exchange rate effects on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents as of beginning of period Cash and cash equivalents as of end of period Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Options [Member] Employee Stock Option [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Securities excluded from computation of diluted earnings per share, amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] 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] Investments [Member] Investments [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Amortized cost Available-for-sale Securities, Amortized Cost Basis Gross unrealized gain Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized loss Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Fair value Acquisitions, Dispositions and Plant Closures [Abstract] Acquisitions, Dispositions and Plant Closures [Abstract]. Acquisitions, Dispositions and Plant Closures Acquisitions, Dispositions and Plant Closures [Text Block] Acquisitions, Dispositions and Plant Closures [Text Block]. Trade receivables - third party and affiliates Accounts Receivable, Net, Current Non-trade receivables, net Nontrade Receivables, Current Inventories, net Inventory, Net Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Marketable securities, at fair value Marketable Securities, Current Other assets Other Assets, Current Total current assets Assets, Current Investments in affiliates Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Goodwill Goodwill Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Current Liabilities Liabilities, Current [Abstract] Short-term borrowings and current installments of long-term debt - third party and affiliates Trade payables - third party and affiliates Other liabilities Deferred income taxes Deferred Tax Liabilities, Net, Current Income taxes payable Accrued Income Taxes, Current Total current liabilities Noncurrent Liabilities Liabilities, Noncurrent [Abstract] Long-term debt Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Uncertain tax positions Liability for Uncertain Tax Positions, Noncurrent Benefit obligations Postemployment Benefits Liability, Noncurrent Other liabilities Total noncurrent liabilities Liabilities, Noncurrent Total Celanese Corporation stockholders' equity Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Total liabilities and equity Liabilities and Equity Schedule of Short-term Debt Schedule of Short-term Debt [Table Text Block] Schedule of Long-term Debt Schedule of Long-term Debt Instruments [Table Text Block] Schedule of First Lien Senior Secured Leverage Ratios Schedule of Debt Instruments First Lien Senior Secured Leverage Ratios [Table Text Block] Schedule of Debt Instruments First Lien Senior Secured Leverage Ratios [Table Text Block]. Schedule of Balances Available for Borrowing Schedule of Line of Credit Facilities [Table Text Block] Ventures and Variable Interest Entities Ventures and Variable Interest Entities [Text Block] Ventures and Variable Interest Entities [Text Block] Benefit Obligations Pension and Other Postretirement Benefits Disclosure [Text Block] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock [Member] Restricted Stock [Member] Share repurchase plan, authorized repurchase amount Stock Repurchase Program, Authorized Amount Shares repurchased Average purchase price per share Treasury Stock Acquired, Average Cost Per Share Amount spent on repurchased shares (in millions) Shares withheld, tax withholding Shares Paid for Tax Withholding for Share Based Compensation Site Contingency [Table] Environmental Remediation Site [Axis] Environmental Remediation Site [Domain] Passaic River, New Jersey [Member] Passaic River, New Jersey [Member] Passaic River, New Jersey [Member]. Site Contingency [Line Items] Number of parties included in USEPA order Number of Parties included in USEPA order Number of Parties included in USEPA order. EPA proposed remedial alternative, low estimate Site Contingency, Loss Exposure Not Accrued, Low Estimate EPA proposed remedial alternative, high estimate Site Contingency, Loss Exposure Not Accrued, High Estimate EPA preferred remedial alternative Site Contingency Loss Exposure Not Accrued, EPA-Preferred Alternative, Estimate Estimate of the loss exposure for reasonably possible environmental contingencies at an individual site for which no accrual has been recorded, based upon the EPA-preferred remedial alternative. Schedule of Available-for-sale Securities Available-for-sale Securities [Table Text Block] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Ratio Maximum [Member] Ratio Maximum [Member] Ratio Maximum [Member]. Ratio Estimate [Member] Ratio Estimate [Member] Ratio Estimate [Member]. Ratio Estimate If Fully Drawn [Member] Ratio Estimate If Fully Drawn [Member] Ratio Estimate If Fully Drawn [Member]. First lien secured leverage ratio Ratio of Senior Secured Debt to Adjusted EBITDA Senior Secured Debt divided by Adjusted EBITDA. Indemnification Agreements Hoechst [Member] Indemnification Agreements Hoechst [Member] Indemnification Agreements Hoechst [Member]. Divestiture Agreements [Member] Divestiture Agreements [Member] Divestiture Agreements [Member]. Number of divestiture agreements Number of divestiture agreements Number of divestiture agreements. Indemnification floor amount Indemnification floor amount The amount that the Company will indemnify Hoechst for in full. Indemnification ceiling amount Indemnification ceiling amount Ceiling amount above which the Company will indemnify Hoechst for. Indemnification percentage exceeding ceiling amount Indemnification percentage exceeding ceiling amount The percentage of the amount above the ceiling that the Company will indemnify Hoechst for. Loss contingency accrual, carrying value, payments Loss Contingency Accrual, Payments Indemnification percentage, other Indemnification percentage, other Percentage of other liabilities the Company has agreed to indemnify Hoechst for as part of the Demerger Agreement. Term of divestiture obligations Term of Divestiture Obligations Term of Divestiture Obligations. Modeled after us-gaap_TermOfUnrecordedUnconditionalPurchaseObligation. Guarantor obligations, maximum exposure Guarantor Obligations, Maximum Exposure, Undiscounted Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Amended Credit Agreement [Member] Amended Credit Agreement [Member] Amended Credit Agreement [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] European Interbank Offered Rate (EURIBOR) [Member] European Interbank Offered Rate [Member] Interest rate at which a bank borrows funds from other banks in the European interbank market & London interbank market Senior notes Debt Instrument, Face Amount Debt Instrument, Repurchase Date Debt Instrument, Repurchase Date Debt Instrument, Redemption Price, Percentage Debt Instrument, Redemption Price, Percentage Refinancing expense Deferred Finance Costs, Gross Deferred Finance Costs, Gross Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Debt Instrument, Repurchase Amount Debt Instrument, Repurchase Amount Interest paid for called senior notes Interest Expense, Debt Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Cross default covenant to other debt Aggregate Amount of Cross Default Debt Constituting Event of Default Aggregate Amount of Cross Default Debt Constituting Event of Default. Estimated margin Debt Instrument, Basis Spread on Variable Rate Amortization rate of initial principal amount per annum payable quarterly Amortization rate of initial principal amount per annum payable quarterly Amortization rate of initial principal amount per annum payable quarterly. Line of credit facility, unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Inventories Inventory Disclosure [Text Block] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Fair Value, by Balance Sheet Grouping [Table] Unobservable Inputs (Level 3) [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Cost investments, carrying amount Cost Method Investments Cost investments, fair value Cost Method Investments, Fair Value Disclosure Insurance contracts in nonqualified trusts, carrying amount Cash Surrender Value of Life Insurance Insurance contracts in nonqualified trusts, fair value Cash Surrender Value, Fair Value Disclosure Long-term debt, including current installments of long-term debt, carrying amount Long-term debt, including current installments of long-term debt, fair value Long-term Debt, Fair Value Estimates and Assumptions Use of Estimates, Policy [Policy Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Net cash provided by (used in) operating activities Proceeds from sale of businesses and assets, net Proceeds from Sale of Productive Assets Deferred proceeds from Kelsterbach plant relocation Deferred Proceeds on Plant Relocation Deferred Proceeds on Plant Relocation. Return of capital from subsidiary Return of capital from subsidiary Return of capital from subsidiary. Contributions to subsidiary Payments to Acquire Interest in Subsidiaries and Affiliates Intercompany loan receipts (disbursements) Proceeds from (Repayments of) Related Party Debt Net cash provided by (used in) investing activities Proceeds from short-term borrowings Repayments of short-term borrowings Dividends to parent Cash Dividends Paid to Parent Company Contributions from parent Proceeds from Contributions from Parent Return of capital to parent Payments of Capital Distribution Net cash provided by (used in) financing activities Net increase (decrease) in cash and cash equivalents Schedule of Environmental Remediation Reserves Environmental Exit Costs by Cost [Table Text Block] Cash and cash equivalents (variable interest entity restricted - 2014: $6) Trade receivables - third party and affiliates (net of allowance for doubtful accounts - 2014: $9; 2013: $9) Inventories Property, plant and equipment (net of accumulated depreciation - 2014: $1,785; 2013: $1,672; variable interest entity restricted - 2014: $388) Other assets (variable interest entity restricted - 2014: $24) Intangible assets (net of accumulated amortization - 2014: $567; 2013: $588) Commitments and Contingencies Commitments and Contingencies Preferred stock, $0.01 par value, 100,000,000 shares authorized (2014 and 2013: 0 issued and outstanding) Preferred Stock, Value, Issued Common stock Common Stock, Value, Issued Treasury stock, at cost (2014: 12,443,438 shares; 2013: 8,928,137 shares) Treasury Stock, Value Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss), net Schedule of Earnings (Loss) Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Collective Bargaining Arrangement [Axis] Collective Bargaining Arrangement [Axis] Collective Bargaining Arrangement [Domain] Collective Bargaining Arrangement [Domain] Narrows Union Employees [Member] Narrows Union Employees [Member] Narrows Union Employees [Member] Geographical [Axis] Geographical [Domain] UNITED STATES Prior service cost credit Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax Lump-sum buyout payments Defined Benefit Plan, Settlements, Plan Assets Contributions to multiemployer defined benefit plan Multiemployer Plan, Period Contributions Schedule of Other (Charges) Gains, Net [Table] Schedule of Other (Charges) Gains, Net [Table]. Entity by Location [Axis] Location [Domain] Roussillon, France and Tarragona, Spain [Member] Roussillon, France and Tarragona, Spain [Member] Roussillon, France and Tarragona, Spain [Member]. Kelsterbach, Germany [Member] Kelsterbach, Germany [Member] Kelsterbach, Germany [Member]. Acetyl Intermediates and Industrial Specialties [Member] Acetyl Intermediates and Industrial Specialties [Member] Acetyl Intermediates and Industrial Specialties [Member]. Business Optimization [Member] Business Optimization [Member] Business Optimization [Member]. Other (Charges) Gains, Net [Line Items] Other (Charges) Gains, Net [Line Items] Other (Charges) Gains, Net [Line Items]. ARO adjustment Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Demerger obligations (Note 17) Demerger obligations Demerger obligations. Divestiture obligations (Note 17) Divestiture obligations Divestiture obligations. Active sites Active sites Active sites. US Superfund sites US Superfund sites US Superfund sites. Other environmental remediation reserves Other environmental remediation reserves Other environmental remediation reserves. Total Accrual for Environmental Loss Contingencies Schedule of Interest Rate Swap Derivatives Schedule of Interest Rate Derivatives [Table Text Block] Schedule of Notional Amounts of Foreign Currency Derivatives Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Schedule of Cross Currency Swap Derivatives [Table Text Block] Schedule of Derivative Instruments [Table Text Block] Schedule of Changes in Fair Value of Derivatives Derivative Instruments, Gain (Loss) [Table Text Block] Offsetting Assets Offsetting Assets [Table Text Block] Offsetting Liabilities Offsetting Liabilities [Table Text Block] Consolidated subsidiaries ownership percentage Noncontrolling Interest, Ownership Percentage by Parent Marketable Securities, at Fair Value Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Environmental Remediation Site [Axis] Environmental Remediation Site [Domain] Meredosia, Illinios [Member] Meredosia, Illinios [Member] Meredosia, Illinios [Member]. EPA settlement agreement Accrual for Environmental Loss Contingencies, Payments Supplemental Environmental Funding Supplemental Environmental Funding Supplemental environmental funding related to settlement agreement in the case of the Meredosia site. Consolidating Guarantor Financial Information Condensed Financial Statements [Text Block] Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Derivative Assets [Abstract] Derivative Asset [Abstract] Gross amount recognized Derivative Asset, Fair Value, Gross Asset Gross amount offset in the consolidated balance sheets Derivative Asset, Fair Value, Gross Liability Net amount presented in the consolidated balance sheets Derivative Asset, Fair Value, Amount Not Offset Against Collateral Gross amount not offset in the consolidated balance sheets Derivative Asset, Collateral, Obligation to Return Cash, Offset Net amount Derivative Asset Noncurrent Other Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Noncurrent [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segments [Member] Corporate, Non-Segment [Member] Corporate, Non-Segment [Member] Eliminations [Member] Intersegment Eliminations [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Operating profit (loss) Depreciation and amortization Depreciation, Depletion and Amortization Capital expenditures Property, Plant and Equipment, Additions Goodwill and intangibles, net Intangible Assets, Net (Including Goodwill) Total assets Increase (decrease) in accrued capital expenditures Increase (Decrease) of Accrued Capital Expenditures Increase (Decrease) of Accrued Capital Expenditures. Statement of Comprehensive Income [Abstract] Equity Components [Axis] Equity Component [Domain] Finished goods Inventory, Finished Goods, Net of Reserves Work-in-process Inventory, Work in Process, Net of Reserves Raw materials and supplies Inventory, Raw Materials and Supplies, Net of Reserves Total New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Recent Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Schedule of Business Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Line of credit facility, prepayment Repayments of Lines of Credit Outstanding amount of accounts receivable transferred by the Originators to the Transferror Cash Flows Between Transferor and Transferee, Proceeds from New Transfers