Fair Value Disclosures [Abstract] Derivative [Table] Derivative [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] 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] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Cross Currency Interest Rate Swaps [Member] Cross Currency Interest Rate Contract [Member] Embedded Derivatives [Member] Embedded Derivative Financial Instruments [Member] Interest Rate Swaps [Member] Interest Rate Swap [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other Comprehensive Income (Loss) [Member] Other Comprehensive Income (Loss) [Member] Interest Expense to Affiliates [Member] Interest Expense Related Party [Member] Interest Expense Related Party [Member] Derivative Instruments [Line Items] Derivative [Line Items] Gain (loss) on derivative instrument Derivative, Gain (Loss) on Derivative, Net Condensed Financial Information of Parent Company Only Disclosure [Abstract] Guarantor Financial Information Condensed Financial Statements [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Acquisitions and Other Transactions [Abstract] Acquisitions and Other Transactions [Abstract] Acquisitions and Other Transactions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Additional Financial Information [Abstract] Additional Financial Information [Abstract] Reclassification Out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Cross Currency Interest Rate Swaps [Member] Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] Foreign Currency Translation [Member] Accumulated Translation Adjustment [Member] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification Out of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Interest expense to affiliates Interest Expense, Related Party Other income, net Other Nonoperating Income (Expense) Income tax effect Income Tax Expense (Benefit) Net income (loss) Net Income (Loss) Attributable to Parent Cash and Cash Equivalents [Abstract] Restricted cash equivalents Restricted Cash and Cash Equivalents, Current Number of embedded derivative agreements Derivative, Number of Instruments Held Number of interest rate swap agreements Number of Interest Rate Derivatives Held Number of cross currency interest rate swap agreements Number of Foreign Currency Derivatives Held Notional amounts Derivative, Notional Amount 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] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Network decommissioning, expected costs Restructuring and Related Cost, Expected Cost Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Current Assets [Member] Other Current Assets [Member] Other Assets [Member] Other Assets [Member] Other Long-term Liabilities [Member] Other Liabilities [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Derivative Instruments, Fair Value [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Embedded derivatives, assets Derivative Asset Embedded derivatives, liabilities Derivative Liability Earnings Per Share [Abstract] Weighted average shares outstanding - basic Weighted Average Number of Shares Outstanding, Basic Dilutive effect of outstanding stock options and awards Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted average shares outstanding - diluted Weighted Average Number of Shares Outstanding, Diluted Earnings (loss) per share - basic Earnings Per Share, Basic Earnings (loss) per share - diluted Earnings Per Share, Diluted 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 [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Options [Member] Employee Stock Option [Member] Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) [Member] Restricted Stock Units and Performance Stock Units [Member] Restricted Stock Units and Performance Stock Units [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Potentially dilutive outstanding securities Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Statement of Cash Flows [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Purchases of spectrum licenses and other intangible assets Payments to Acquire Intangible Assets Short term affiliate loan receivable, net Increase (Decrease) in Due from Affiliates, Current Cash and cash equivalents acquired in MetroPCS business combination Cash Acquired from Acquisition Investments in unconsolidated affiliates, net Payments for (Proceeds from) Businesses and Interest in Affiliates 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] Repayments of short-term debt for purchases of property and equipment Repayments of Short-term Debt Repayments related to a variable interest entity Repayments of Other Debt Distribution to affiliate Payments of Capital Distribution Taxes paid related to net share settlement of stock awards Payments Related to Tax Withholding for Share-based Compensation Excess tax benefit from stock-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Proceeds from exercise of stock options Proceeds from Stock Options Exercised Other, net Proceeds from (Payments for) Other Financing Activities Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents Beginning of period Cash and Cash Equivalents, at Carrying Value End of period Short-term Debt [Abstract] Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Handset Financing Arrangement [Member] Product Financing Arrangement [Member] Short-term Debt Short-term Debt [Line Items] Borrowing capacity Line of Credit Facility, Capacity Available for Trade Purchases Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Trading Symbol Trading Symbol Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Factoring Arrangements [Abstract] Factoring Arrangements [Abstract] Transaction Type [Axis] Transaction Type [Axis] Transaction [Domain] Transaction [Domain] Factoring Arrangement [Member] Factoring Arrangements [Member] Factoring Arrangements [Member] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Not Primary Beneficiary [Member] Variable Interest Entity, Not Primary Beneficiary [Member] Maximum funding limit Maximum Funding Limit Maximum funding limit Derecognized net receivables Qualitative and Quantitative Information, Transferor's Continuing Involvement, Principal Amount Outstanding, Derecognized Amount Net cash proceeds Cash Flows Between Transferor and Transferee, Proceeds from New Transfers Deferred purchase price Trading Securities Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities Other current liabilities Other Liabilities, Current Net expense Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale, Gain (Loss) on Sale Maximum exposure Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Equipment Installment Plan Receivables [Abstract] Equipment Installment Plan Receivables [Abstract] Schedule of Equipment Installment Plan Receivables Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Equipment Installment Plan Receivables by Credit Category Financing Receivable Credit Quality Indicators [Table Text Block] Schedule of Deferred Interest and Allowance for Credit Losses Allowance for Credit Losses on Financing Receivables [Table Text Block] Condensed Consolidated Comprehensive Income (Loss) [Abstract] Condensed Consolidated Comprehensive Income (Loss) [Abstract] Revenues Revenues [Abstract] Branded postpaid revenues Branded postpaid revenues Branded Postpaid Service Revenue Branded prepaid revenues Branded prepaid revenues Branded Prepaid Service Revenue Wholesale revenues Wholesale service revenue Wholesale Service Revenue Roaming and other service revenues Roaming and other service revenue Roaming and Other Revenue Total service revenues Sales Revenue, Services, Net Equipment sales Sales Revenue, Goods, Net Other revenues Other Revenue, Net Total revenues Revenues Operating expenses Costs and Expenses [Abstract] Cost of services, exclusive of depreciation and amortization shown separately below Cost of Services Cost of equipment sales Cost of Goods Sold Selling, general and administrative Selling, General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization MetroPCS transaction and integration costs Business Combination, Integration Related Costs Restructuring costs Restructuring Charges Other, net Other Operating Income (Expense), Net Total operating expenses Costs and Expenses Operating income Operating Income (Loss) Interest expense Interest Expense Interest income Interest Income, Other Other income (expense), net Total other expense, net Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax expense Net income (loss) Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax [Abstract] Net gain on cross currency interest rate swaps, net of tax effect of $0, $39, $0, and $13 Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Net loss on foreign currency translation, net of tax effect of $0, ($62), $0 and ($37) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Unrealized loss on available-for-sale securities, net of tax effect of $0, $0, ($1) and $0 Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Other comprehensive loss, net of tax Other Comprehensive Income (Loss), Net of Tax Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Earnings (loss) per share Basic Diluted Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Basic [Abstract] Basic Diluted Statement of Financial Position [Abstract] Assets Assets [Abstract] Current assets Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, net of deferred interest and allowances of $473 and $381 Accounts Receivable, Net, Current Accounts receivable from affiliates Due from Affiliate, Current Inventory Inventory, Net Current portion of deferred tax assets, net Deferred Tax Assets, Net, Current Other current assets Other Assets, Current Total current assets Assets, Current Property and equipment, net of accumulated depreciation of $21,137 and $19,649 Property, Plant and Equipment, Net Goodwill Goodwill Spectrum licenses Indefinite-Lived License Agreements Other intangible assets, net of accumulated amortization of $643 and $476 Finite-Lived Intangible Assets, Net Other assets Other Assets, Noncurrent Total assets Assets Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Current liabilities Liabilities, Current [Abstract] Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Current payables and short-term debt to affiliates Due to Affiliate, Current Short-term debt Debt, Current Deferred revenue Deferred Revenue, Current Other current liabilities Total current liabilities Liabilities, Current Long-term debt to affiliates Due to Affiliate, Noncurrent Long-term debt Long-term Debt, Excluding Current Maturities Long-term financial obligation Sale Leaseback Transaction, Amount Due under Financing Arrangement Deferred tax liabilities Deferred Tax Liabilities, Net, Noncurrent Deferred rents Deferred Rent Credit, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Total long-term liabilities Liabilities, Noncurrent Commitments and contingencies Commitments and Contingencies Stockholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock, par value $0.00001 per share, 100,000,000 shares authorized; no shares issued and outstanding Preferred Stock, Value, Issued Common stock, par value $0.00001 per share, 1,000,000,000 shares authorized; 808,508,529 and 803,262,309 shares issued, 807,126,024 and 801,879,804 shares outstanding Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Treasury stock, at cost, 1,382,505 and 1,382,505 shares issued Treasury Stock, Value Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders' equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders' equity Liabilities and Equity Schedule of Condensed Financial Statements [Table] Condensed Financial Statements [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Parent [Member] Parent Company [Member] Issuer [Member] Subsidiary Issuer [Member] Guarantor Subsidiaries [Member] Guarantor Subsidiaries [Member] Non-Guarantor Subsidiaries [Member] Non-Guarantor Subsidiaries [Member] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Consolidating and Eliminating Adjustments [Member] Consolidation, Eliminations [Member] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Service revenues Operating expenses Nonoperating Income (Expense) [Abstract] Earnings (loss) of subsidiaries Earnings (Loss) of Subsidiaries Earnings (Loss) of Subsidiaries Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) [Abstract] Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) [Abstract] Net gain on cross currency interest rate swaps, tax Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Net loss on foreign currency translation, tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Unrealized loss on available-for-sale securities, tax Other Comprehensive Income (Loss), Available-for-sale Securities, Tax Additional Financial Information Additional Financial Information Disclosure [Text Block] Spectrum License Transactions [Abstract] Spectrum License Transactions [Abstract] Other, Net [Member] Other, net [Member] Other, net [Member] Spectrum License Transactions - AWS and PCS [Member] Spectrum License Transactions - AWS and PCS [Member] Spectrum License Transactions - AWS and PCS Spectrum License Transaction - 700 MHz A-Block, AWS and PCS [Member] Spectrum License Transaction - 700 MHz A block, AWS and PCS [Domain] Spectrum License Transaction - 700 MHz A-Block, AWS and PCS Cash payment to acquire spectrum license Fair value of spectrum licenses acquired Indefinite-lived Intangible Assets Acquired Non-cash gain on spectrum transaction Gain (Loss) on Disposition of Intangible Assets Receivables [Abstract] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Prime [Member] Prime [Member] Prime [Member] Subprime [Member] Subprime [Member] Subprime [Member] Billing Status, Type [Axis] Billing Status, Type [Axis] Receivables Billing Status [Domain] Receivables Billing Status [Domain] Unbilled [Member] Unbilled Revenues [Member] Billed [Member] Billed Revenues [Member] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Equipment Installment Plan Receivable [Member] Equipment Installment Plan Receivable [Member] Equipment Installment Plan Receivable [Member] Equipment Installment Plan Receivables [Line Items] Financing Receivable, Recorded Investment [Line Items] Equipment installment plan receivables, current Financing Receivable, Recorded Investment, Current Equipment installment plan receivables, past due Financing Receivable, Recorded Investment, Past Due Equipment installment plan receivables, gross Financing Receivable, Gross Schedule of Reclassifications Out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Accounts receivable, net Property and equipment, net of accumulated depreciation Other intangible assets, net of accumulated amortization Investments in subsidiaries, net Investments in Subsidiaries, Net Investments in Subsidiaries, Net Intercompany receivables Intercompany Receivables Intercompany Receivables Negative carrying value of subsidiaries, net Negative Carrying Value of Subsidiaries, Net Negative Carrying Value of Subsidiaries, Net Intercompany payables Intercompany Payables Intercompany Payables Total stockholders' equity Interest payments Interest Paid Income tax payments Income Taxes Paid, Net Increase in accounts payable for purchases of property and equipment Capital Expenditures Incurred but Not yet Paid Short-term debt outstanding for financing of property and equipment purchases Noncash or Part Noncash Acquisition, Fixed Assets Acquired Retirement of long-term debt to affiliates Noncash Notes to Affiliates Retired Noncash transaction in which notes to affiliates were extinguished. Elimination of net unamortized discounts and premiums on long-term debt to affiliates Noncash Elimination of Notes to Affiliates, Unamortized Discount (Premium), Net Noncash elimination of the unamortized discounts and premiums on notes to affiliates upon extinguishment. Issuance of new long-term debt to affiliates Noncash Notes Issued to Affiliates Noncash replacement notes issued to affiliates Settlement of accounts receivable from affiliates and other outstanding balances Noncash Settlement of Accounts Receivable from Affiliates and Other Receivables through Noncash Payments Noncash settlement of net receivable balances with affiliates. Income tax benefit from debt recapitalization Noncash Effect of Debt Recapitalization, Tax Noncash income tax benefit as a result of the net effect of the debt recapitalization. Net assets acquired in MetroPCS business combination, excluding cash acquired Noncash or Part Noncash Acquisition, Value of Assets Acquired Subsequent Events Subsequent Events [Text Block] Guarantee Liabilities [Abstract] Guarantee Liabilities [Abstract] Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Handset Upgrade Program [Member] Handset Upgrade Program [Member] Handset Upgrade Program [Member] Guarantee Liabilities Guarantor Obligations [Line Items] Guarantee liabilities Guarantor Obligations, Current Carrying Value Maximum exposure, related to guarantee liabilities Guarantor Obligations, Maximum Exposure, Undiscounted Schedule of Condensed Consolidating Balance Sheet Information Condensed Balance Sheet [Table Text Block] Schedule of Condensed Consolidating Statement of Comprehensive Income (Loss) Information Condensed Income Statement [Table Text Block] Schedule of Condensed Consolidating Statement of Cash Flows Information Condensed Cash Flow Statement [Table Text Block] Deferred interest and allowances Allowance for Doubtful Accounts Receivable, Current Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization 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 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 Common stock, shares outstanding Common Stock, Shares, Outstanding Treasury stock, at cost, shares issued Treasury Stock, Shares Purchase Commitments [Table] Other Commitments [Table] Purchase Commitments [Axis] Other Commitments [Axis] Purchase Commitments [Domain] Other Commitments [Domain] Purchase Commitments [Member] Other Purchase Commitments [Member] Other Purchase Commitments [Member] Purchase Commitments [Line Items] Other Commitments [Line Items] Twelve Months Ending June 30, Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] 2015 Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months 2016 Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two 2017 Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three 2018 Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four 2019 Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five Thereafter Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five Total future minimum payments Unrecorded Unconditional Purchase Obligation Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [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] Carrying Amount [Member] Reported Value Measurement [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Deutsche Telekom [Member] Affiliated Entity [Member] Long-Term Debt, Fair Value [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Long-term debt Notes Payable, Fair Value Disclosure Fair Value Measurements and Derivative Instruments Fair Value Disclosures [Text Block] Parent Investment in Subsidiaries [Abstract] Parent Investment in Subsidiaries [Abstract] Contribution to issuer Contributions To Subsidiaries Contributions to Subsidiaries Schedule of Fair Value of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Gains (Losses) on Derivative Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Schedule of Carrying Values and Fair Values of Long-term Debt Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Investment in subsidiaries Parent Investment in Subsidiaries Parent Investment in Subsidiaries Proceeds from capital contribution Proceeds from Contributions from Parent Schedule of Purchase Commitments Other Commitments [Table Text Block] Equipment Installment Plan Receivables Financing Receivables [Text Block] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Deferred Interest, Long-term [Member] Long-term Portion of Deferred interest [Member] Long-term portion of EIP deferred interest Equipment Installment Plan Receivables, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Equipment Installment Plan Receivables, Deferred Interest and Allowance for Credit Losses [Roll Forward] Financing Receivable, Allowance for Credit Losses [Roll Forward] Deferred interest and allowance for credit losses, beginning of period Financing Receivable, Allowance for Credit Losses Bad debt expense Provision for Loan, Lease, and Other Losses Write-offs, net of recoveries Financing Receivable, Allowance for Credit Losses, Write-downs Change in deferred interest on short-term and long-term EIP receivables Allowance for Doubtful Accounts Receivable, Change in Deferred Interest Allowance for Doubtful Accounts Receivable, Change in Deferred Interest Deferred interest and allowance for credit losses, end of period Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts Receivable, Net [Member] Accounts Receivable [Member] Deferred Interest [Member] Deferred interest [Member] Deferred interest [Member] Allowances for Credit Losses [Member] Allowance for Doubtful Accounts [Member] Equipment Installment Plan Receivables [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Equipment installment plan, maximum payment terms Equipment Installment Plan, Maximum Payment Term Equipment Installment Plan, Maximum Payment Term Equipment installment plan receivables, deferred interest and allowance for credit losses Equipment installment plan receivables, net of deferred interest Equipment installment plan receivables, net of deferred interest Equipment installment plan receivables, net of deferred interest Equipment installment plan receivables, net Financing Receivable, Net Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block]