Proceeds from sale of business Proceeds from Divestiture of Businesses Advances to affiliates Nontrade Receivables, Current Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Statistical Measurement [Domain] Statistical Measurement [Domain] Capitalized Contract Cost [Axis] Capitalized Contract Cost [Axis] Property, plant and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment Interest rate (as a percent) Notes Receivable, Stated Interest Rate Notes Receivable, Stated Interest Rate Award Timing Predetermined Award Timing Predetermined [Flag] Related Party Transaction [Axis] Related Party Transaction [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Judicial Ruling Judicial Ruling [Member] Entity File Number Entity File Number Tabular List, Table Tabular List [Table Text Block] Other Financial Information Additional Financial Information Disclosure [Text Block] Schedule of Other Liabilities Other Noncurrent Liabilities [Table Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Affiliate Revenue Schedule of Related Party Transactions [Table Text Block] Contract fulfillment costs Contract with Customer, Asset, after Allowance for Credit Loss, Current Schedule of Carrying Amounts and Estimated Fair Values Fair Value, by Balance Sheet Grouping [Table Text Block] Schedule of Balance Sheet Components at Fair Value as of Transaction Close Date Disposal Groups, Including Discontinued Operations [Table Text Block] Union employees concentration risk Unionized Employees Concentration Risk [Member] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Measurement Basis [Axis] Measurement Basis [Axis] Deferred revenue Disposal Group, Including Discontinued Operation, Deferred Revenue Adjustment to Compensation: Adjustment to Compensation [Axis] Affiliate Transactions Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Other Other Assets, Miscellaneous, Current Revenue Recognition Revenue from Contract with Customer [Text Block] Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Net assets Disposal Group, Including Discontinued Operation, Assets Capitalized Contract Cost [Domain] Capitalized Contract Cost [Domain] Adjustment to Compensation, Amount Adjustment to Compensation Amount Concentration risk percentage Concentration Risk, Percentage Affiliates Affiliated Entity [Member] Other Deferred Income Taxes and Other Liabilities, Noncurrent Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Proceeds from sale of property, plant and equipment and other assets Proceeds from Sale of Productive Assets Total stockholder's equity Balance at beginning of period Balance at end of period Equity, Attributable to Parent Insider Trading Policies and Procedures [Line Items] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] CURRENT ASSETS Assets, Current [Abstract] TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY Liabilities and Equity Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] LIABILITIES AND STOCKHOLDER'S EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Portion at fair value measurement Portion at Fair Value Measurement [Member] Divestiture Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Maximum Maximum [Member] Acquisition Costs Contract Acquisition Costs [Member] Incremental costs incurred in obtaining a contract with a customer, which are recognized (i.e., amortized) over the term of the initial contract and anticipated renewal contracts to which the costs relate. Total goodwill and other assets Intangible Assets Net Including Goodwill and Other Assets, Noncurrent Aggregate carrying amount, as of the balance sheet date, of finite-lived intangible assets, indefinite-lived intangible assets, goodwill and other noncurrent assets not separately disclosed in the balance sheet. Accounting Policies [Abstract] Intangible assets, net Net Carrying Amount Finite-Lived Intangible Assets, Net Punitive Damages Punitive Damages [Member] Punitive Damages Concentration Risk Type [Domain] Concentration Risk Type [Domain] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Long-term debt Debt Instrument [Line Items] Changes in advances to affiliates Proceeds from Collection of Advance to Affiliate Labor Union Contracts Concentration Risk Disclosure [Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Business Customers Business Customers [Member] Business Customers [Member] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction INCOME BEFORE INCOME TAX EXPENSE Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Affiliate Services Affiliate services [Member] Affiliate services revenues Other liabilities Total Other liabilities Other Liabilities, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Schedule of Other Current Assets, Net Schedule of Other Current Assets [Table Text Block] Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Current operating lease liability Operating Lease, Liability, Current 2031 and thereafter Long-Term Debt, Maturity, Year Five And Thereafter Long-Term Debt, Maturity, Year Five And Thereafter Deferred income taxes, net Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Percentage of Operating revenue Operating Lease, Lease Income, Percent of Operating Revenue Operating Lease, Lease Income, Percent of Operating Revenue Accrued income and other taxes Increase (Decrease) in Accrued Taxes Payable Award Timing Method Award Timing Method [Text Block] Litigation Case [Domain] Litigation Case [Domain] Award Type Award Type [Axis] Legal Entity [Axis] Legal Entity [Axis] TOTAL ASSETS Assets Trading Symbol(s) Trading Symbol Entity Address, City or Town Entity Address, City or Town OPERATING ACTIVITIES Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Entity Emerging Growth Company 2029 Long-Term Debt, Maturity, Year Three Capitalized Contract Cost [Table] Capitalized Contract Cost [Table] Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Beginning of period balance End of period balance Capitalized Contract Cost, Net Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Input Level 2 Fair Value, Inputs, Level 2 [Member] Unamortized debt issuance costs Debt Issuance Costs, Net Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Other Other Liabilities, Miscellaneous, Current Other Liabilities, Miscellaneous, Current Net pre-tax loss on disposal Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Common stock, share outstanding (in shares) Common Stock, Shares, Outstanding Provision for uncollectible accounts Accounts Receivable, Credit Loss Expense (Reversal) Current portion of deferred revenue Disposal Group, Including Discontinued Operation, Deferred Revenue, Current PEO PEO [Member] Changes in current assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] RETAINED EARNINGS Retained Earnings [Member] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Total Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Income tax expense Income Tax Expense (Benefit) Income and other taxes Taxes Payable, Current Statutory Damages Statutory Damages [Member] Statutory Damages Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Product and Service [Domain] Product and Service [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Contract Costs Capitalized Contract Cost [Table Text Block] Other Broadband Revenue Category, Other Broadband [Member] Revenue Category, Other Broadband Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Discontinued Operations and Disposal Groups [Abstract] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Current affiliate obligation Accrued Liabilities, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Customer Receivables and Contract Balances Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] INVESTING ACTIVITIES Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Disposed of by Sale Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Related Party Transactions [Abstract] Subsequent Event Subsequent Event [Member] Goodwill Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Estimate of possible loss Loss Contingency, Estimate of Possible Loss PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Allowance for credit losses Contract with Customer, Receivable, Allowance for Credit Loss Equity Components [Axis] Equity Components [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Concentration Risk [Table] Concentration Risk [Table] Affiliate obligations, net Accounts Payable and Accrued Liabilities, Noncurrent OPERATING EXPENSES Operating Costs and Expenses [Abstract] Number of reportable segments Number of Reportable Segments FCPA Litigation FCPA Litigation [Member] FCPA Litigation Interest income—affiliate, net Interest and Other Income Cost incurred Capitalized Contract Cost, Incurred Capitalized Contract Cost, Incurred Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Goodwill, accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss Other Performance Measure, Amount Other Performance Measure, Amount Entity Address, State or Province Entity Address, State or Province Related Party [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Litigation Status [Axis] Litigation Status [Axis] Individual: Individual [Axis] Other current assets and liabilities, net Increase (Decrease) in Other Current Assets and Liabilities, Net Other current assets, net Total Other current assets, net Other Assets, Current Entities [Table] Entities [Table] Entity [Domain] Entity [Domain] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Net loss on sale of business Gain (Loss) on Disposition of Business Interest paid, including affiliate interest (net of capitalized interest of $5 and $10) Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Note receivable - affiliates Financing Receivable, after Allowance for Credit Loss, Current Entity Interactive Data Current Entity Interactive Data Current DEFERRED CREDITS AND OTHER LIABILITIES Deferred Revenue, Noncurrent [Abstract] Capitalized software Computer Software, Intangible Asset [Member] Carrying Amount Reported Value Measurement [Member] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Current maturities of long-term debt Less current maturities Long-Term Debt and Lease Obligation, Current Increase (Decrease) in Stockholder's Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Workforce subject to collective-bargaining arrangements expiring within one year Workforce Subject to Collective-Bargaining Arrangements Expiring within One Year [Member] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Weighted Average Weighted Average [Member] Amortization expense Amortization of Intangible Assets Selling, general and administrative Selling, General and Administrative Expense Capital expenditures Payments to Acquire Productive Assets Depreciation and amortization Depreciation, Depletion and Amortization Other assets, net Other Assets, Noncurrent Customer [Domain] Customer [Domain] Entity Central Index Key Entity Central Index Key PEO Name PEO Name Schedule of Maturities of Long-Term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Total operating revenue Total Revenue Total revenue Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair Value Disclosure Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Operating expenses—affiliates Costs and Expenses, Related Party Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Arrangement Duration Trading Arrangement Duration Current portion of deferred revenue Contract with Customer, Liability, Current Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Class of Stock [Domain] Class of Stock [Domain] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Other, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Subsequent Event Type [Axis] Subsequent Event Type [Axis] Consideration Disposal Group, Including Discontinued Operation, Consideration ASSETS Assets [Abstract] Non-affiliates Nonrelated Party [Member] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Legacy Revenue Category, Legacy [Member] Revenue Category, Legacy Debt Instrument [Axis] Debt Instrument [Axis] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Mass Markets Customers Mass Markets Customers [Member] Mass Markets Customers [Member] Gross Carrying Amount Finite-Lived Intangible Assets, Gross STOCKHOLDER'S EQUITY Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Number of states in which entity operates Number of States in which Entity Operates Entity Address, Address Line One Entity Address, Address Line One Old Notes - 6.75% Notes Due 2057 Old Notes - 6.75% Notes Due 2057 [Member] Old Notes - 6.75% Notes Due 2057 Deferred revenue Deferred Revenue Number of people killed Loss Contingency, Number Of People Killed Loss Contingency, Number Of People Killed Note receivable, amount permitted to be borrowed Financing Receivable, Maximum Borrowing Capacity Financing Receivable, Maximum Borrowing Capacity Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Accounts receivable, allowance Accounts Receivable, Allowance for Credit Loss, Current Schedule of Revenue Revenue from External Customers by Products and Services [Table Text Block] Operating lease liability Operating Lease, Liability, Noncurrent Customer receivables, less allowance Contract with Customer, Receivable, after Allowance for Credit Loss Finance leases Finance Lease Obligation [Member] Finance Lease Obligation [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Held-for-sale Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] New Notes - 6.500% Notes Due 2056 New Notes - 6.500% Notes Due 2056 [Member] New Notes - 6.500% Notes Due 2056 Total liabilities Disposal Group, Including Discontinued Operation, Liabilities Interest expense Interest Expense, Other Schedule of Long-Term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Total operating expenses Costs and Expenses Related Party Transaction [Line Items] Related Party Transaction [Line Items] Document Quarterly Report Document Quarterly Report Fiber Broadband Revenue Category, Fiber Broadband [Member] Revenue Category, Fiber Broadband Voice and Other Revenue Category, Voice And Other [Member] Revenue Category, Voice And Other Long-term debt (excluding finance leases) Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Other current liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Current Schedule of Intangible Assets, Net Schedule of Finite-Lived Intangible Assets [Table Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] 6.5% Notes Due 2056 6.5% Notes Due 2056 [Member] 6.5% Notes Due 2056 Name Trading Arrangement, Individual Name All Award Types Award Type [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] Revenue recognized from prior year contract liability Contract with Customer, Liability, Revenue Recognized Number of patent infringement lawsuits Loss Contingency, Patents Allegedly Infringed, Number MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Restricted cash included in Other assets, net Restricted Cash, Noncurrent Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] OPERATING REVENUE Revenues [Abstract] LONG-TERM DEBT Long-term debt, excluding current maturities Long-Term Debt and Lease Obligation Other current assets, net Disposal Group, Including Discontinued Operation, Other Assets, Current 2027 Long-Term Debt, Maturity, Year One Litigation Case [Axis] Litigation Case [Axis] Potential future cost obligations Disposal Group, Including Discontinued Operation, Potential Future Cost Obligations Disposal Group, Including Discontinued Operation, Potential Future Cost Obligations Employees covered under collective bargaining agreements Number of Employees, Total [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Lumen Technologies, Inc. Lumen Technologies, Inc. [Member] Lumen Technologies, Inc. Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum Minimum [Member] GOODWILL AND OTHER ASSETS Assets, Noncurrent [Abstract] Other net assets Disposal Group, Including Discontinued Operation, Other Assets Property, plant and equipment, accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Company Selected Measure Name Company Selected Measure Name Changes in advances to affiliates Payments for Advance to Affiliate Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Total long-term debt Long-Term Debt and Lease Obligation, Including Current Maturities Changes in other assets and liabilities, net Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net Senior notes Senior Notes [Member] Amortization Expense for Intangible Assets Finite-Lived Intangible Assets Amortization Expense [Table Text Block] Long-Term Debt Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Common stock - one share without par value, owned by Qwest Services Corporation Common Stock, Value, Issued Commitments, Contingencies and Other Items Commitments and Contingencies Disclosure [Text Block] Allocated affiliate revenue Allocated Revenue [Member] Allocated Revenue Segments Segment Reporting, Policy [Policy Text Block] COMMITMENTS AND CONTINGENCIES (Note 8) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Entity Small Business Entity Small Business Document Transition Report Document Transition Report Underlying Securities Award Underlying Securities Amount Labor Union Contracts Concentration Risk [Line Items] Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Old Notes - 6.500% Notes Due 2056 Old Notes - 6.500% Notes Due 2056 [Member] Old Notes - 6.500% Notes Due 2056 Goodwill Disposal Group, Including Discontinued Operation, Goodwill Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Document Type Document Type Input Level 3 Fair Value, Inputs, Level 3 [Member] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Product and Service [Axis] Product and Service [Axis] Total Revenue from Contracts with Customers Revenue from Contract with Customer, Excluding Assessed Tax Litigation Status [Domain] Litigation Status [Domain] All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Interest paid, capitalized interest Interest Paid, Capitalized, Investing Activity Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Changes in affiliate obligations, net Increase (Decrease) in Due to Affiliates Disposal Group Classification [Axis] Disposal Group Classification [Axis] Cash, cash equivalents, and restricted cash: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Number of lawsuits Loss Contingency, New Claims Filed, Number Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Disposal Group Name [Axis] Disposal Group Name [Axis] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Other liabilities Disposal Group, Including Discontinued Operation, Other Liabilities Contract term Revenue From Contract With Customer, Contract Term Revenue from Contract with Customer, Contract Term Accrued expenses and other liabilities Accrued Liabilities, Current [Abstract] Entity Information [Line Items] Entity Information [Line Items] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] CURRENT LIABILITIES Liabilities, Current [Abstract] Fully amortized and retired capitalized software Fully Amortized And Retired Capitalized Software [Member] Fully Amortized And Retired Capitalized Software 6.75% Notes Due 2057 6.75% Notes Due 2057 [Member] 6.75% Notes Due 2057 Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Additional depreciation if disposal group did not meet the held for sale criteria Disposal Group, Including Discontinued Operations, Held-For-Sale Criteria Not Met, Depreciation Disposal Group, Including Discontinued Operations, Held-For-Sale Criteria Not Met, Depreciation Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Mass Markets fiber-to-the home business Mass Markets Fiber-To-The Home Business [Member] Mass Markets Fiber-To-The Home Business Accounts receivable, net of allowance of $38 and $37 Accounts Receivable, after Allowance for Credit Loss, Current Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Amortization Capitalized Contract Cost, Amortization Accounts payable Increase (Decrease) in Other Accounts Payable Total other income (expense), net Nonoperating Income (Expense) Strategic Revenue Category, Strategic [Member] Revenue Category, Strategic Contractual credits and commercial agreements liabilities Disposal Group, Including Discontinued Operation, Liabilities, Contractual Credits And Commercial Agreements Disposal Group, Including Discontinued Operation, Liabilities, Contractual Credits And Commercial Agreements New Notes - 6.750% Notes Due 2057 New Notes - 6.750% Notes Due 2057 [Member] New Notes - 6.750% Notes Due 2057 Contractual credits Disposal Group, Including Discontinued Operation, Liabilities, Contractual Credits Disposal Group, Including Discontinued Operation, Liabilities, Contractual Credits Income taxes paid, net Income Taxes Paid, Net Award Timing Disclosures [Line Items] Assets held for sale Disposal Group, Including Discontinued Operation, Assets, Current Long-term debt, gross Total long-term debt Long-Term Debt, Gross Salaries and benefits Employee-related Liabilities, Current Contract acquisition costs Capitalized Contract Cost, Net, Current Change in contract costs held for sale Capitalized Contract Cost, Change In Contract Costs Held For Sale Capitalized Contract Cost, Change In Contract Costs Held For Sale Schedule of Other Current Liabilities Other Current Liabilities [Table Text Block] NET (LOSS) INCOME Net (loss) income Net Income (Loss) Attributable to Parent Schedule of Gross Operating Lease Revenue Operating Lease, Lease Income [Table Text Block] Expiration Date Trading Arrangement Expiration Date Pending Litigation Pending Litigation [Member] Length of customer life Revenue From Contract With Customer, Length Of Customer Life Revenue from Contract with Customer, Length of Customer Life Number of Authorized Shares Not Disclosed Number Of Authorized Shares Not Disclosed Number Of Authorized Shares Not Disclosed Property, plant and equipment, net of accumulated depreciation of $9,050 and $8,910 Property, Plant and Equipment, Net Adjustments for non-ASC 606 revenue Revenue Not from Contract with Customer Adoption Date Trading Arrangement Adoption Date Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Entity Current Reporting Status Entity Current Reporting Status Customer [Axis] Customer [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] OPERATING INCOME Operating Income (Loss) Commercial agreements Disposal Group, Including Discontinued Operation, Liabilities, Commercial Agreements Disposal Group, Including Discontinued Operation, Liabilities, Commercial Agreements Retained earnings Retained Earnings (Accumulated Deficit) Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Class of Stock [Axis] Class of Stock [Axis] IRU term Indefeasible Right to Use (IRU), Contract Term Indefeasible Right to Use (IRU), Contract Term Subsequent Event Type [Domain] Subsequent Event Type [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Other income, net Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Deferred income taxes Deferred Income Tax Expense (Benefit) Adjustments to reconcile net (loss) income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Contract liabilities Contract with Customer, Liability Operating Lease Revenue Lessor, Leases [Policy Text Block] All Adjustments to Compensation All Adjustments to Compensation [Member] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Amendment Flag Amendment Flag 2028 Long-Term Debt, Maturity, Year Two Total deferred credits and other liabilities Deferred Credits and Other Liabilities, Noncurrent Termination Date Trading Arrangement Termination Date Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Unrecognized tax benefits Liability for Uncertainty in Income Taxes, Noncurrent Background Basis of Presentation and Significant Accounting Policies [Text Block] Cost of services and products (exclusive of depreciation and amortization) Cost of Product and Service Sold Disposal Group Classification [Domain] Disposal Group Classification [Domain] Related Party Transaction [Domain] Related Party Transaction [Domain] Capitalized Contract Cost [Line Items] Capitalized Contract Cost [Line Items] Net increase in note receivable - affiliates Origination of Notes Receivable from Related Parties Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount OTHER (EXPENSE) INCOME Nonoperating Income (Expense) [Abstract] Entity Tax Identification Number Entity Tax Identification Number Regulatory cost liability related to the sale of the Mass Markets Fiber-to-the-Home business Regulatory Liabilities, Fair Value Disclosure Regulatory Liabilities, Fair Value Disclosure Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Lumen Mass Markets fiber-to-the-home business Lumen Mass Markets Fiber-To-The Home Business [Member] Lumen Mass Markets Fiber-To-The Home Business Common stock, share issued (in shares) Common Stock, Shares, Issued 2030 Long-Term Debt, Maturity, Year Four Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Amount awarded to other party Litigation Settlement, Amount Awarded to Other Party Rollforward of Goodwill Schedule of Goodwill [Table Text Block] Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Operating lease revenue Operating Lease, Lease Income Loss Contingencies [Line Items] Loss Contingencies [Line Items] Insider Trading Arrangements [Line Items] Direct affiliate revenue Direct Revenue From Related Party [Member] Direct Revenue From Related Party Security Exchange Name Security Exchange Name 2026 (remaining nine months) Long-Term Debt, Maturity, Remainder of Fiscal Year Capital expenditures Capital Expenditures Incurred but Not yet Paid Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Prepaid expenses Prepaid Expense, Current Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Other current liabilities Total Other current liabilities Other Liabilities, Current Unfavorable Regulatory Action Unfavorable Regulatory Action [Member] Fulfillment Costs Contract Fulfillment Costs [Member] Contract Fulfillment Costs [Member] Statement [Line Items] Statement [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Marshall Fire Litigation Marshall Fire Litigation [Member] Marshall Fire Litigation Counterparty Name [Axis] Counterparty Name [Axis] COMMON STOCK Common Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Net increase in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation