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Programming expenses include the fees paid to license the programming distributed to video customers, such as the programming license fees charged by cable networks and fees charged for retransmission of the signals from local broadcast television stations. Production costs include the amortization of owned and acquired programming, sports rights, direct production costs, residual and participation payments, production overhead, costs associated with the distribution of programming to third-party networks and other distribution platforms, and on-air talent costs. It also includes the amortization of capitalized theatrical film production and acquisition costs and distribution expenses. 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Ownership percentage representing fair market value floor for put and call option Equity Method Investment, Ownership Percentage Representing Fair Market Value Floor For Put And Call Option Equity Method Investment, Ownership Percentage Representing Fair Market Value Floor For Put And Call Option Liabilities and Equity Liabilities and Equity [Abstract] Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Percentage of residual returns Percentage Of Residual Returns Represents the percentage of any residual returns that we have the right to receive Hedging Relationship [Domain] Hedging Relationship [Domain] Summary of Significant Accounting Policies Business Description and Basis of Presentation [Text Block] Ownership percentage Equity Method Investment, Ownership Percentage Realized and unrealized gains (losses) on equity securities, net Equity Securities, FV-NI, Gain (Loss) Entity Interactive Data Current Entity Interactive Data Current Thereafter Long-Term Debt, Maturity, after Year Five 2.0% Exchangeable Subordinated Debentures due 2029 Exchangeable Subordinated Debentures 2.0 Percent Due 2029 [Member] Exchangeable Subordinated Debentures 2.0% Due 2029 [Member] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Four Corporate and Other Corporate, Non-Segment, Intersegment Revenue [Member] Corporate, Non-Segment, Intersegment Revenue 0.250% Notes due 2029 Notes 0.250 percent Due 2029 [Member] Notes 0.250 percent Due 2029 Supplemental Financial Information Additional Financial Information Disclosure [Text Block] Voting power Common Stock Voting Power Common Stock Voting Power Settlements with tax authorities and other Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Owned Film, Monetized On Its Own, Amortization Expense, Including Participations And Residuals Amount of amortization expense for capitalized film cost for film predominantly monetized on its own and participation and residuals expenses. 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Repurchases and retirements of common stock Stock Repurchased and Retired During Period, Shares Other Payments for (Proceeds from) Other Investing Activities Backlog as a percent of annual revenue (in percent) Backlog As A Percent Of Annual Revenue, Percent Backlog As A Percent Of Annual Revenue, Percent Capital expenditures Capital Expenditures Payments to Acquire Property, Plant, and Equipment Audit Information [Abstract] Audit Information Significant Transactions Significant Transactions [Text Block] The disclosure of significant transactions entered into or completed during the period. 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Excludes lease costs associated with production activities or other amounts capitalized in our consolidated balance sheet. 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Adjustments to additional paid in capital, income tax benefit from share-based compensation Share-based Payment Arrangement, Expense, Tax Benefit Management fee funding commitment Equity Method Investment, Management Fee Funding Commitment Equity Method Investment, Management Fee Funding Commitment Retained earnings Retained Earnings (Accumulated Deficit) Term loans Term Loans [Member] Term Loans [Member] Operating Segments Operating Segments [Member] Period from grant date that an equity-based award expires Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Restricted share units Restricted Stock Units (RSUs) [Member] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Employee stock purchase plans Stock Issued During Period, Shares, Employee Stock Purchase Plans Entity Filer Category Entity Filer Category Total deferred tax liabilities Deferred Tax Liabilities, Gross Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Equity method Equity Method Investments Income Statement [Abstract] Income Statement [Abstract] Number of votes entitled of each class B common stock Number Of Votes Entitled Of Each Class B Common Stock Number of votes entitled to vote for each share of Class B common stock share. Customer premise equipment Customer Premise Equipment [Member] Customer premise equipment [Member] Entity Registrant Name Entity Registrant Name Broadcast
Television Broadcast Television [Member] Broadcast Television Member Contributions from (distributions to) noncontrolling interests, net Contributions From And Distributions To Noncontrolling Interests Attributable To Temporary Equity Contributions from and (distributions to) noncontrolling interests attributable to temporary equity. Gross Carrying Amount Indefinite-lived Intangible Assets (Excluding Goodwill) Less: Current investments Short-term Investments Filmed
Entertainment Filmed Entertainment [Member] Filmed Entertainment Member Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Total equity Balance, beginning of year Balance, end of year Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Income tax expense Income tax (expense) benefit Income Tax Expense (Benefit) Theatrical Theatrical [Member] Theatrical [Member] Universal Beijing Resort Term Loans Universal Beijing Resort Term Loans [Member] Universal Beijing Resort Term Loans [Member] Deferred tax liability attributable to temporary differences in other comprehensive income (loss) Changes In Net Deferred Tax Liability Related To Other Comprehensive Income Changes in net deferred tax liability that were not recorded as deferred income tax benefit (expense) associated with items included in other comprehensive income (loss) Receivables, net Receivables, net Accounts Receivable, after Allowance for Credit Loss, Current Amendment Flag Amendment Flag Commitments And Contingencies [Table] Commitment And Contingencies [Table] Commitment And Contingencies [Table] Proceeds from borrowings Proceeds from Issuance of Long-term Debt Equity Components [Axis] Equity Components [Axis] Entity Tax Identification Number Entity Tax Identification Number Benefit obligation Deferred Compensation Plans Benefit Obligation Deferred compensation plans benefit obligation Document Fiscal Period Focus Document Fiscal Period Focus Total current assets Assets, Current Total future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Asset Acquisition [Table] Asset Acquisition [Table] Other income (loss), net Other Income Loss Net Nonoperating income (losses), net recorded in the income statement that are not separately stated. Realized (gains) losses reclassified to net income, net of deferred taxes of $(4), $31 and $(10) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Financial Data by Business Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Redemption of subsidiary preferred stock Temporary Equity, Redemption Of Preferred Stock Temporary Equity, Redemption Of Preferred Stock Senior notes with maturities greater than 10 years, at face value Senior notes with maturities greater than 10 years, at face value [Member] Senior notes with maturities greater than 10 years [Member] Federal Deferred Federal Income Tax Expense (Benefit) Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Media Media [Member] Media Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Product and Service [Axis] Product and Service [Axis] Contractual value of a potential obligation Contractual Value Of A Potential Future Obligation Contractual value of a potential future obligation based on a contractual formula on a specified date. Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Nonmarketable equity securities Equity Securities without Readily Determinable Fair Value, Amount Entity Public Float Entity Public Float Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Content licensing Content Licensing [Member] Content Licensing [Member] Future minimum commitments for licensed content Entertainment, License Agreement For Program Materials, Unrecorded Future Minimum Amount Entertainment, License Agreement For Program Materials, Unrecorded Future Minimum Amount Stock option fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Component [Domain] Equity Component [Domain] Stock compensation plans Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Other Stockholders' Equity, Other 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Currency translation adjustments, net of deferred taxes of $76, $(331) and $(66) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax NBCUniversal Enterprise NBCUniversal Enterprise [Member] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Investments [Abstract] Investments [Abstract] Statement [Line Items] Statement [Line Items] Deferred gains (losses), net of deferred taxes of $(36), $26 and $(4) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Restricted cash included in other noncurrent assets, net Restricted Cash, Noncurrent Borrowings outstanding under commercial paper program Commercial Paper Total investments Investments Property and equipment and intangible assets accrued but not yet paid Capital Costs Incurred But Not Yet Paid Future cash outflow to pay for purchases of property and equipment and intangible assets that have occurred. Purchases of investments Payments to Acquire Investments Federal Tax Authority Domestic Tax Authority [Member] Schedule of recognized share-based compensation expense Share-based Payment Arrangement, Cost by Plan [Table Text Block] Counterparty Name [Domain] Counterparty Name [Domain] 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Total Intangible Assets, Gross (Excluding Goodwill) Debt Disclosure [Abstract] Debt Disclosure [Abstract] Schedule of stock option and restricted share units activity Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] 2024 Film, Monetized on Its Own, Released Film, Expected Amortization, Year Three Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Summary of Intangible Assets Schedule Of Finite-Lived And Indefinite-Lived Intangible Assets [Table Text Block] Schedule Of Finite-Lived And Indefinite-Lived Intangible Assets Other equipment Other Capitalized Property Plant and Equipment [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Differences between book and tax basis of property and equipment and intangible assets Deferred Tax Liabilities, Property, Plant And Equipment And Intangible Assets Amount before allocation of valuation allowances of deferred tax liability attributable to deductible temporary differences from property and equipment and intangible assets. Federal research and development credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Less: Valuation allowance Beginning balance Ending balance Deferred Tax Assets, Valuation Allowance 2022 Film, Monetized on Its Own, Completed and Not Released Film, Expected Amortization in Next Operating Cycle Other Other [Member] Other [Member] Auditor Location Auditor Location Corporate and Other Corporate, Non-Segment [Member] Segment Reporting [Abstract] Segment Reporting [Abstract] Collateralized obligation Collateralized Obligation Carrying amount of obligation presented separately as collateralized obligation that is secured by assets. Weighted-Average Original Useful Life Finite-lived intangible asset amortization period (not to exceed) Finite-Lived Intangible Asset, Useful Life Employee Benefit Plans Retirement Benefits [Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Construction of Universal Beijing Resort Payments For Construction Of Theme Park The cash outflow associated with the construction of a theme park. Stock options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Schedule of weighted average common shares outstanding Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Funding commitment by management company investors Equity Method Investment, Funding Commitment By Management Company Investors Equity Method Investment, Funding Commitment By Management Company Investors Completed, not released Film, Monetized on Its Own, Capitalized Cost, Completed and Not Released Document Annual Report Document Annual Report Term loans Proceeds from borrowings Other Long-term Debt Noncurrent deferred revenue (included in other noncurrent liabilities) Deferred Revenue, Noncurrent Title of 12(b) Security Title of 12(b) Security Direct-to-consumer Direct To Consumer [Member] Direct To Consumer [Member] Total assets Consolidated variable interest entity's assets included in condensed consolidated balance sheet Assets 2022 Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Expected Amortization, Year One Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Expected Amortization, Year One Investment, Name [Domain] Investment, Name [Domain] Film Costs and Entertainment Entities Film Costs And Entertainment Entities, Policy [Policy Text Block] Disclosure of accounting policy for film costs related to film libraries and for entertainment entities. Common stock, shares authorized (in shares) Common Stock, Shares Authorized Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Carrying value of contractual obligation Carrying value of contractual obligation Carrying value of future obligation classified as a liability which is no longer recorded at fair value. Geographical [Domain] Geographical [Domain] Theme Parks Theme Parks [Member] Theme Parks Member Supplemental Financial Information [Line Items] Supplemental Financial Information [Line Items] [Line Items] for Supplemental Financial Information [Table] Air Touch Air Touch [Member] Air Touch [member] Title of Individual [Axis] Title of Individual [Axis] Document Type Document Type Equity [Table] Equity [Table] Equity [Table] Home Entertainment and Other Home Entertainment and Other [Member] Home Entertainment and Other Product and Service [Domain] Product and Service [Domain] Noncontrolling Interests Noncontrolling Interest [Member] Depreciation and Amortization Depreciation, Depletion and Amortization, Nonproduction Schedule of receivables, net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Derivative Contract [Domain] Derivative Contract [Domain] Cash capital contributions for equity method investments Capital Contribution To VIE The cash outflow associated with a capital contribution to a VIE accounted for as an equity method investment Net income (loss) Net Income (Loss) Attributable to Noncontrolling Interest Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Revolving Credit Facilities Revolving Credit Facility [Member] Differences between book and tax basis of foreign subsidiaries and undistributed foreign earnings Deferred Tax Liabilities, Undistributed Foreign Earnings Timing period of recognition Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Schedule of cash, cash equivalents and restricted cash ScheduleOfCashCashEquivalentsAndRestrictedCash [Table Text Block] Tabular disclosure of the components of cash, cash equivalents and restricted cash. Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Schedule of Long-Term Debt Schedule of Debt [Table Text Block] 2023 Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Expected Amortization, Year Two Amount of amortization for right acquired by broadcaster under license agreement for program material, including sports rights advances, expected to be recognized within second operating cycle following most recent annual statement of financial position. Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Buildings, theme park infrastructure and leasehold improvements Buildings, Theme Park Infrastructure And Leasehold Improvements [Member] Buildings, Theme Park Infrastructure And Leasehold Improvements Geographical [Axis] Geographical [Axis] Weighted-average number of common shares outstanding – basic Weighted Average Number of Shares Outstanding, Basic Diluted earnings per common share attributable to Comcast Corporation shareholders (in dollars per share) Earnings Per Share, Diluted Segments [Domain] Segments [Domain] Contributions from (distributions to) noncontrolling interests, net Contributions From And Distributions To Noncontrolling Interests Contributions from and distributions to noncontrolling interests Foreign Currency Denominated Debt Foreign Currency Denominated Debt [Member] Foreign Currency Denominated Debt Net Investment Hedging Net Investment Hedging [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Net income (loss) Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Income taxes Income Taxes Paid, Net Other Non-US [Member] Summary of operating lease assets and liabilities Schedule Of Current And Noncurrent Assets And Liabilities [Table Text Block] Schedule Of Current And Noncurrent Assets And Liabilities [Table Text Block] Foreign income taxed at different rates Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Comprehensive income attributable to Comcast Corporation Comprehensive Income (Loss), Net of Tax, Attributable to Parent Investments Investment, Policy [Policy Text Block] Proceeds from collateralized obligation Proceeds From Collateralized Obligation The cash inflow from amounts received from the issuance of an obligation that is secured by assets and is presented separately as proceeds from collateralized obligation. Sky Sky Limited [Member] Sky Limited [Member] Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Treasury stock, 872,791,028 Class A common shares Treasury Stock, Value Employee benefit obligations and other, deferred taxes Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Reclassification Adjustment, Tax Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Reclassification Adjustment, Tax Expected payment terms Revenue, Performance Obligation, Description Of Payment Terms, Period Revenue, Performance Obligation, Description Of Payment Terms, Period Residential, Video Residential, Video [Member] Residential, Video [Member] Deferred income taxes Deferred Income Tax Liabilities, Net Award vesting period in years Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Equity in net income (losses) of investees, net Income (Loss) from Equity Method Investments Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Schedule of items that effect income tax expense Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Lease Arrangements [Axis] Lease Arrangements [Axis] Lease Arrangements Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Accounts payable and accrued expenses related to trade creditors Accounts Payable, Current Depreciation and amortization Depreciation, Depletion and Amortization 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Three Foreign Tax Authority Foreign Tax Authority [Member] Term of contract Revenue, Performance Obligation, Description Of Timing, Term Of Contract Revenue, Performance Obligation, Description Of Timing, Term Of Contract Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Dividends payable Dividends Payable Common stock, shares outstanding (in shares) Common stock, shares outstanding at beginning of period Common stock, shares outstanding at end of period Common Stock, Shares, Outstanding Investments Noncurrent investments Long-term Investments Financial Instruments [Domain] Financial Instruments [Domain] Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Net (gain) loss on investment activity and other Gain (Loss) On Investments And Other Noncash Income (Loss) Net Net (gain) loss on investment activity, including cash received from investees, and other noncash income (loss), net. Licensed Entertainment, License Agreement for Program Material [Abstract] Deferred Tax Liabilities: Deferred Tax Liabilities, Net [Abstract] Distribution Distribution [Member] Distribution Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Software Computer Software, Intangible Asset [Member] Document Period End Date Document Period End Date Class B Common Stock Common Class B [Member] Percent of losses Equity Method Investment, Percent Of Losses Represents the percentage of any losses in an equity method investment that the Company is obligated to absorb. Cash paid for intangible assets Cash Paid for Intangible Assets Payments to Acquire Intangible Assets Entity Central Index Key Entity Central Index Key Funding commitment Equity Method Investment, Funding Commitment Equity Method Investment, Funding Commitment Consolidated Entities [Domain] Consolidated Entities [Domain] Universal Beijing Resort Universal Beijing Resort [Member] Universal Beijing Resort [Member] State Deferred State and Local Income Tax Expense (Benefit) Property and Equipment Property, Plant and Equipment [Table Text Block] Income Statement Location [Domain] Income Statement Location [Domain] Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Reductions for tax positions of prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Customer relationships Customer Relationships [Member] Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Other noncurrent liabilities Other Liabilities, Noncurrent 5.50% Notes due 2029 Notes 5.50 Percent Due 2029 [Member] Notes 5.50% Due 2029 [Member] Potential increase to max borrowing capacity Line of Credit Facility, Potential Increase To Maximum Borrowing Capacity Line of Credit Facility, Potential Increase To Maximum Borrowing Capacity Amortization of Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Debt Instrument [Line Items] Debt Instrument [Line Items] Trading Symbol Trading Symbol Residential, Broadband Residential, Broadband [Member] Residential, Broadband [Member] Maximum amount of annual capital calls Equity Method Investment, Annual Capital Calls, Maximum Amount Equity Method Investment, Annual Capital Calls, Maximum Amount Property and equipment, at cost Property, Plant and Equipment, Gross Beginning balance Ending balance Accounts Receivable, Allowance for Credit Loss Unrealized gains (losses) recognized Equity Securities, FV-NI, Unrealized Gain (Loss) Deferred gains (losses) on cash flow hedges AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Revenue Revenues Film and television content: Film And Television Content [Abstract] Film And Television Content Residential, Wireless Residential, Wireless [Member] Residential, Wireless [Member] Weighted-average exercise price of shares outstanding (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Additions charged to income tax expense and other accounts Valuation Allowance, Deferred Tax Asset, Additions Charged To Income Tax Expense And Other Accounts Valuation Allowance, Deferred Tax Asset, Additions Charged To Income Tax Expense And Other Accounts Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Term of agreement Equity Method Investment, Investment Term Equity Method Investment, Investment Term Costs and Expenses: Costs and Expenses [Abstract] Deferred gains (losses) on cash flow hedges, deferred taxes Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Distribution systems Distribution System [Member] Distribution System [Member] Total debt Debt and Lease Obligation Schedule of Goodwill [Table] Schedule of Goodwill [Table] Recognized share-based compensation expense Share-based Payment Arrangement, Expense Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Entity Current Reporting Status Entity Current Reporting Status Film and television costs Film, Monetized On Its Own, And Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Capitalized Costs, Noncurrent Amount of capitalized film cost for film predominantly monetized on its own and capitalized cost for rights acquired by broadcaster under license agreement for program material, including sports rights advances, noncurrent. Asset Acquisition [Line Items] Asset Acquisition [Line Items] Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Receivables, gross Accounts Receivable, before Allowance for Credit Loss, Current Restricted cash included in other current assets Restricted Cash, Current Completed, not released: Film, Disclosures [Abstract] Counterparty Name [Axis] Counterparty Name [Axis] Schedule of income before income taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Construction in process Construction in Progress [Member] Class A Common Stock Common Class A [Member] Cash, cash equivalents and restricted cash, beginning of year Cash, cash equivalents and restricted cash, end of year Cash, cash equivalents and restricted cash, end of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Home entertainment Home Entertainment [Member] Home Entertainment [Member] Cash payments received upon redemption of preferred stock Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities United States UNITED STATES Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Current Assets: Assets, Current [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Other Proceeds from (Payments for) Other Financing Activities Gross Carrying Amount Finite-Lived Intangible Assets, Gross Investment and Other Income (Loss), Net Components Of Investment And Other Income Loss Net [Table Text Block] Tabular disclosure of investment and other income (loss), net, including, but not limited to, equity in net income (losses) of investees, net, realized and unrealized gains (losses) on equity securities, net, and other income (loss), net. Cash flow hedges: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Income Taxes Income Tax, Policy [Policy Text Block] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Deferred revenue Deferred Revenue, Current Finite-Lived Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Weighted-average number of common shares outstanding – diluted Weighted Average Number of Shares Outstanding, Diluted Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Income Taxes Income Tax Disclosure [Text Block] Borrowing margin for LIBOR based borrowings Debt Instrument, Basis Spread on Variable Rate Business services Business Services [Member] Business Services [Member] Equity Stockholders' Equity Note Disclosure [Text Block] Reductions due to expiration of statutes of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Five Deferred tax liability attributable to acquisitions Changes In Net Deferred Tax Liability Related To Acquisitions Changes In Net Deferred Tax Liability Related To Acquisitions 2022 Film, Monetized on Its Own, Released Film, Expected Amortization, Year One Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Auditor Firm ID Auditor Firm ID Currency Swap Currency Swap [Member] Cash capital contributions for equity method investments Payments to Acquire Equity Method Investments Content Content [Member] Content [Member] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets [Line Items] Indefinite-lived Intangible Assets [Line Items] Credit Facility [Axis] Credit Facility [Axis] Senior notes with maturities between 5 and 10 years, at face value Senior notes with maturities between 5 and 10 years, at face value [Member] Senior notes with maturities between 5 and 10 years [Member] Entity Address, Address Line One Entity Address, Address Line One Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Reconciliation of Adjusted EBITDA from Segments to Consolidated Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Changes in operating assets and liabilities, net of effects of acquisitions and divestitures: Increase (Decrease) in Operating Capital [Abstract] Interest expense Deferred Compensation Plans interest cost Deferred compensation plans interest cost Less: Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Employee stock purchase plans Stock Issued During Period, Value, Employee Stock Purchase Plan Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Future minimum commitments for sports rights License Agreement Commitments, Sports Rights, Unrecorded Future Minimum Amount License Agreement Commitments, Sports Rights, Unrecorded Future Minimum Amount Basis of Presentation Consolidation, Policy [Policy Text Block] Entity Shell Company Entity Shell Company Expected option life Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Total current liabilities Liabilities, Current Employee stock purchase plans Employee Stock [Member] Class of Stock [Domain] Class of Stock [Domain] Payments to acquire business Payments to Acquire Businesses, Gross Eliminations Intersegment Eliminations [Member] Realized (gains) losses on cash flow hedges, deferred taxes Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Capitalized Film and Television Costs Schedule Of Capitalized Film And Television Costs [Table Text Block] Schedule of capitalized costs for film predominantly monetized on its own and for rights acquired by broadcaster under license agreement for program material, including sports rights advances, recorded at the balance sheet date. Maximum borrowing capacity of revolving credit facilities Line of Credit Facility, Maximum Borrowing Capacity Schedule of changes in the valuation allowance for deferred tax assets Summary of Valuation Allowance [Table Text Block] Ownership [Domain] Ownership [Domain] Segment Reporting Information [Line Items] Revenue [Line Items] Segment Reporting Information [Line Items] Current Fiscal Year End Date Current Fiscal Year End Date Cable Communications Cable Communications [Member] Cable Communications Member Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] 0.250% Notes due 2027 Notes 0.250 percent Due 2027 [Member] Notes 0.250% Due 2027 [Member] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Other current assets Other Assets, Current Statement [Table] Statement [Table] Stock Option Valuation Assumptions: Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Unrecognized pretax compensation expense on nonvested awards Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Statistical Measurement [Axis] Statistical Measurement [Axis] Federal tax at statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount AT&T Inc. AT&T Inc. [Member] AT&T Inc. [Member] Goodwill Balance, beginning of period Balance, end of period Goodwill Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Advertising Advertising [Member] Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Franchise rights Franchise Rights [Member] Differences between book and tax basis of long-term debt Deferred Tax Liabilities, Long-Term Debt Amount before allocation of valuation allowances of deferred tax liability attributable to deductible temporary differences from long-term debt. Foreign Current Foreign Tax Expense (Benefit) Schedule of Goodwill Schedule of Goodwill [Table Text Block] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Noncurrent receivables, net (included in other noncurrent assets, net) Accounts Receivable, after Allowance for Credit Loss, Noncurrent Equity [Line Items] Equity [Line Items] [Line Items] for Equity [Table] Schedule of common stock outstanding Schedule of Common Stock Outstanding Roll Forward [Table Text Block] Studios and Media Studios and Media [Member] Studios and Media Changes in the allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss [Table Text Block] Owned: Owned Film, Capitalized Cost [Abstract] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Commitments And Contingencies [Line Items] Commitment And Contingencies [Line Items] [Line Items] for Commitment And Contingencies [Table] 2023 Film, Monetized on Its Own, Released Film, Expected Amortization, Year Two Deferred income taxes Deferred income tax (expense) benefit Deferred Income Tax Expense (Benefit) Senior notes Senior Notes Schedule of Other Investments [Line Items] Investment Holdings [Line Items]