0.750% Notes due 2032 Notes 0.750 percent due 2032 [Member] Notes 0.750% due 2032 [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Repurchases and repayments of debt Repayments of Other Debt Less: Net income (loss) attributable to noncontrolling interests Less: Net income (loss) attributable to noncontrolling interests Net income (loss) Net Income (Loss) Attributable to Noncontrolling Interest In production and in development Film, Monetized On Its Own, Capitalized Cost, In Production And In Development Amounts of capitalized film cost incurred in production and in development of film predominantly monetized on its own Accrued expenses and other current liabilities Accrued Liabilities, Current Total current assets Assets, Current Other intangible assets, net of accumulated amortization of $29,103 and $25,860 Other Intangible Assets, Net Changes in operating assets and liabilities, net of effects of acquisitions and divestitures: Increase (Decrease) in Operating Capital [Abstract] 1.875% Notes due 2036 Notes 1.875 percent due 2036 [Member] Notes 1.875% due 2036 [Member] Restricted cash included in other current assets and other noncurrent assets, net Restricted Cash Total Accounts Receivable, after Allowance for Credit Loss Award Type [Domain] Award Type [Domain] Investment, Name [Domain] Investment, Name [Domain] Residential Connectivity Residential Connectivity [Member] Residential Connectivity [Member] Long-Term Debt Debt Disclosure [Text Block] Other income (loss), net Other Nonoperating Income (Expense) Entity Filer Category Entity Filer Category Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Impact of foreign currency on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Impairment of intangible assets Impairment of Intangible Assets, Finite-Lived Schedule of Other Balance Sheet Accounts Schedule Of Other Balance Sheet Accounts Related To Recognition Of Revenue [Table Text Block] Schedule Of Other Balance Sheet Accounts [Table Text Block] Deferred income taxes Deferred Income Tax Liabilities, Net Segment Reporting [Abstract] Segment Reporting [Abstract] Accounts payable and accrued expenses related to trade creditors Accounts Payable, Current Domestic broadband Domestic Broadband [Member] Domestic Broadband Investment, Name [Axis] Investment, Name [Axis] Currency translation adjustments, net of deferred taxes Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Purchases of investments Payments to Acquire Investments Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Preferred stock, shares authorized Preferred Stock, Shares Authorized Investment and other income (loss), net Investment and other income (loss), net Investment and other income (loss), net Nonoperating Income (Expense) 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. Total investments Investments Commitments and contingencies Commitments and Contingencies Weighted-average fair value of restricted share units granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Connectivity & Platforms Connectivity And Platforms [Member] Connectivity And Platforms Schedule of Goodwill Schedule of Goodwill [Table Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Deferred revenue Deferred Revenue, Current Equity and Share-Based Compensation Equity [Text Block] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities 1.250% Notes due 2040 Notes 1.250 percent due 2040 [Member] Notes 1.250% due 2040 [Member] Theatrical Theatrical [Member] Theatrical [Member] Universal Beijing Resort Term Loans Universal Beijing Resort Term Loans [Member] Universal Beijing Resort Term Loans [Member] 1.500% Notes due 2029 Notes 1.500 percent Due 2029 [Member] Notes 1.500% Due 2029 [Member] Class of Stock [Axis] Class of Stock [Axis] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Domestic distribution Domestic Distribution [Member] Domestic Distribution Condensed Consolidated Financial Statements Business Description and Basis of Presentation [Text Block] Programming and production Total programming and production costs Programming And Production Costs The amount of expense recognized in the period for costs associated with video programming and content acquisition and production costs. 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. Ownership [Axis] Ownership [Axis] Investment securing collateralized obligation Less: Investment securing collateralized obligation Investment Securing Collateralized Obligation Carrying amount of investment presented separately as investment securing collateralized obligation that is partially securing an obligation. Headquarters/Corporate and Other Corporate and Other Corporate, Non-Segment [Member] Other operating assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Depreciation and amortization Depreciation, Depletion and Amortization Owned: Film, Capitalized Cost [Abstract] Current Liabilities: Liabilities, Current [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Accumulated impairment losses, beginning of period Accumulated impairment losses, end of period Goodwill, Impaired, Accumulated Impairment Loss Total Comcast Corporation shareholders’ equity Equity, Attributable to Parent Preferred stock—authorized, 20,000,000 shares; issued, zero Preferred Stock, Value, Issued Content & Experiences Content And Experiences [Member] Content And Experiences Eliminations Intersegment Eliminations [Member] Consolidation Items [Axis] Consolidation Items [Axis] Schedule of Investment Summary Summary Investment Holdings [Table Text Block] Goodwill impairment loss Goodwill, Impairment Loss Diluted earnings (loss) per common share attributable to Comcast Corporation shareholders (in dollars per share) Earnings Per Share, Diluted Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Receivables, net Receivables, net Accounts Receivable, after Allowance for Credit Loss, Current Goodwill [Roll Forward] Goodwill [Roll Forward] Realized (gains) losses reclassified to net income, net of deferred taxes of $2, $(10), $18 and $(26) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Receivable [Domain] Receivable [Domain] Content licensing Content Licensing [Member] Content Licensing [Member] Marketing and promotion Marketing and Advertising Expense Content & Experiences Content & Experiences [Member] Content & Experiences [Member] Currency translation adjustments, net of deferred taxes of $(20), $15, $(42) and $304 Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Deferred gains (losses) on cash flow hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Treasury shares Treasury Stock, Common, Shares Long-term debt, less current portion Long-Term Debt and Lease Obligation Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Nonmarketable equity securities Equity Securities without Readily Determinable Fair Value, Amount Cash paid for intangible assets Payments to Acquire Intangible Assets Redeemable noncontrolling interests Balance, beginning of period Balance, end of period Redeemable Noncontrolling Interest, Equity, Carrying Amount Trading Symbol Trading Symbol Preferred stock, shares issued Preferred Stock, Shares Issued Theme Parks Theme Parks Segment [Member] Theme Parks Member Weighted-average fair value of stock options granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Total fair value of debt Long-Term Debt, Fair Value Net income (loss) attributable to Comcast Corporation Net income (loss) Net Income (Loss) Total current liabilities Liabilities, Current Entity Emerging Growth Company Entity Emerging Growth Company Released, less amortization Film, Monetized on Its Own, Capitalized Cost, Released Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Total carrying value of debt Debt and Lease Obligation Finance Receivable Program [Axis] Finance Receivable Program [Axis] Finance Receivable Program Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] Equipment Installment Plan Equipment Installment Plan [Member] Equipment Installment Plan Liabilities and Equity Liabilities and Equity [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Other Temporary Equity, Other Changes Document Fiscal Period Focus Document Fiscal Period Focus Dividends payable (in dollars per share) Dividends Payable, Amount Per Share Schedule of Weighted Average Common Shares Outstanding Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Number of primary businesses Number Of Businesses Number Of Businesses Share-based compensation Share-Based Payment Arrangement, Noncash Expense Class B Common Stock Common Class B [Member] Other Other [Member] Other [Member] Equity method investments and certain retained distributions Equity Method Investments and Certain Retained Distributions Equity Method Investments and Certain Retained Distributions Class A Common Stock Common Stock [Member] Employee benefit obligations and other, net of deferred taxes of $2, $9, $5 and $14 Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Noncash interest expense (income), net Noncash Interest Expense (Income) Net Represents noncash interest expense (income) items as adjustments to reconcile net income (loss) to cash provided by (used in) operating activities. City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Purchase of short-term instruments Payments to Acquire Short-Term Investments Product and Service [Axis] Product and Service [Axis] Goodwill Goodwill, beginning of period Goodwill, end of period Goodwill Equity Components [Axis] Equity Components [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Construction of Universal Beijing Resort Payments For Construction Of Theme Park The cash outflow associated with the construction of a theme park. Document Fiscal Year Focus Document Fiscal Year Focus Programming and Production Costs Entertainment [Text Block] Total equity Balance, beginning of period Balance, end of period Accumulated other comprehensive income (loss), net of deferred taxes Equity, Including Portion Attributable to Noncontrolling Interest Number of stock options granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Residential Connectivity & Platforms Residential Connectivity And Platforms Segment [Member] Residential Connectivity And Platforms Segment Entity Small Business Entity Small Business Film and television costs, net Increase Decrease In Film And Television Cost, Net Increase Decrease In Film And Television Cost, Net Atairos Atairos [Member] Atairos [Member] Finance Receivable Program [Domain] Finance Receivable Program [Domain] Finance Receivable Program [Domain] Media Media Segment [Member] Media Segment Investments [Abstract] Investments [Abstract] Deferred gains (losses) on cash flow hedges, deferred taxes Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Short-Term Instruments Short-Term Instruments [Member] Short-Term Instruments Film and television costs Film, Monetized On Its Own Capitalized Cost, And Entertainment, License Agreement For Program Material, Including Sports Rights Advances Total amounts 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. Local Phone Number Local Phone Number Property and equipment, net of accumulated depreciation of $58,316 and $56,939 Property, Plant and Equipment, Net Cash distribution received from equity method investments Proceeds from Equity Method Investment, Distribution Noncurrent receivables, net (included in other noncurrent assets, net) Accounts Receivable, after Allowance for Credit Loss, Noncurrent International networks International Networks [Member] International Networks Cash dividends declared per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Contributions from (distributions to) noncontrolling interests, net Contributions From (Distributions To) Noncontrolling Interests Contributions From (Distributions To) Noncontrolling Interests Current and noncurrent receivables, net Change In Current And Noncurrent Receivables Net The increase (decrease) during the reporting period in the amount of current and noncurrent receivables. Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Dividends declared Dividends, Common Stock, Cash Assets Assets [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Proceeds from borrowings Proceeds from Issuance of Long-Term Debt Management Grant Management Grant [Member] Management Grant [Member] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] 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 Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Depreciation Depreciation Depreciation Net income (loss) Net income (loss) Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Income taxes Income Taxes Paid, Net Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Other Payments for (Proceeds from) Other Investing Activities Retained Earnings Retained Earnings [Member] Cash flow hedges: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Schedule of Reconciliation of Adjusted EBITDA from Segments to Consolidated Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Total liabilities and equity Liabilities and Equity Other noncurrent assets, net Other Assets, Noncurrent Ownership [Domain] Ownership [Domain] Basic earnings (loss) per common share attributable to Comcast Corporation shareholders (in dollars per share) Earnings Per Share, Basic Revenue Revenues Product and Service [Domain] Product and Service [Domain] Unbilled Revenues Unbilled Revenues [Member] Entity Address, City or Town Entity Address, City or Town Schedule of Restricted Cash Restrictions on Cash and Cash Equivalents [Table Text Block] Schedule of Financial Data by Business Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Business Unit [Domain] Business Unit [Domain] Business Unit [Domain] 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. Award Type [Axis] Award Type [Axis] Antidilutive securities Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of restricted share units granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Plan Name [Domain] Plan Name [Domain] Document Quarterly Report Document Quarterly Report Interest expense Interest expense Interest Expense Property and equipment and intangible assets accrued but not yet paid Capital Expenditures Incurred but Not yet Paid Supplemental Financial Information Additional Financial Information Disclosure [Text Block] Document Transition Report Document Transition Report Goodwill [Line Items] Goodwill [Line Items] Domestic advertising Domestic Advertisement [Member] Domestic Advertisement Common stock, shares authorized Common Stock, Shares Authorized Realized (gains) losses on cash flow hedges, deferred taxes Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Foreign currency translation and other Goodwill, Foreign Currency Translation Gain (Loss) And Other Goodwill, Foreign Currency Translation Gain (Loss) And Other Document And Entity Information [Table] Document Information [Table] Entity File Number Entity File Number Other operating and administrative Other Operating And Administrative Other operating and administrative expense recognized in the period not presented separately. Realized and unrealized gains (losses) on equity securities, net Equity Securities, FV-NI, Gain (Loss) Noncurrent deferred revenue (included in other noncurrent liabilities) Deferred Revenue, Noncurrent Amortization Amortization Amortization of Intangible Assets Entity Shell Company Entity Shell Company Investments Noncurrent investments Long-Term Investments Franchise rights Indefinite-Lived Franchise Rights 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] 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. Notes Receivable Notes Receivable [Member] Receivables Billing Status [Domain] Receivables Billing Status [Domain] 2.0% Exchangeable Subordinated Debentures due 2029 Exchangeable Subordinated Debentures 2.0 Percent Due 2029 [Member] Exchangeable Subordinated Debentures 2.0% Due 2029 [Member] Headquarters/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 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. Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Cash, cash equivalents and restricted cash, end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Investments and Variable Interest Entities Investment [Text Block] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Dividends payable Dividends Payable Additional paid-in capital Additional Paid in Capital Common stock, shares issued Common Stock, Shares, Issued Universal Beijing Resort Universal Beijing Resort [Member] Universal Beijing Resort [Member] Treasury stock, 872,791,028 Class A common shares Treasury Stock, Common, Value Security Exchange Name Security Exchange Name Deferred income taxes Deferred Income Tax Expense (Benefit) Document And Entity Information [Line Items] Document Information [Line Items] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Remaining unfunded capital commitment Variable Interest Entity, Reporting Entity Involvement, Unfunded Capital Commitment Variable Interest Entity, Reporting Entity Involvement, Unfunded Capital Commitment Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Cumulative translation adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Current portion of long-term debt Debt, Current Business Unit [Axis] Business Unit [Axis] Business Unit Class A Common Stock, $0.01 par value Class A Common Stock Common Class A [Member] Total costs and expenses Costs and Expenses Other Proceeds from (Payments for) Other Financing Activities Comprehensive income (loss) attributable to Comcast Corporation Comprehensive Income (Loss), Net of Tax, Attributable to Parent Other Industries [Abstract] Other Industries [Abstract] 5.50% Notes due 2029 Notes 5.50 Percent Due 2029 [Member] Notes 5.50% Due 2029 [Member] Unrecognized pretax compensation expense on nonvested awards Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Type Document Type Proceeds from sales of businesses and investments Proceeds From Sales Of Businesses And Investments The cash inflow associated with the sale of businesses and investments, if any, during the period. Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Programming and Production Expense Schedule Of Programming And Production Cost [Table Text Block] Schedule Of Programming And Production Cost Entity Address, Address Line One Entity Address, Address Line One Entity Registrant Name Entity Registrant Name Effect of dilutive securities Potentially dilutive securities (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Receivable Type [Axis] Receivable Type [Axis] Unrealized gains (losses) recognized Equity Securities, FV-NI, Unrealized Gain (Loss) Film and television content: Film And Television Content [Abstract] Film And Television Content Noncontrolling interests Equity, Attributable to Noncontrolling Interest Cable
Communications Cable Communications Segments [Member] Cable Communications Member Ownership percentage in variable interest entity Subsidiary, Ownership Percentage, Parent Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Proceeds from (repayments of) short-term borrowings, net Proceeds from (Repayments of) Short-Term Debt Document Period End Date Document Period End Date Property and equipment - accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Sky Sky Limited Segment [Member] Sky Limited [Member] 0.000% Notes due 2026 Notes 0.000 percent Due 2026 [Member] Notes 0.000 percent Due 2026 Less: Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Treasury Stock at Cost Treasury Stock, Common [Member] Entity Central Index Key Entity Central Index Key Decrease to deferred tax liabilities from change in state tax rate Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Net income (loss) Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Recognized share-based compensation expense Share-Based Payment Arrangement, Expense Advertising Advertising [Member] Accounts payable and accrued expenses related to trade creditors Increase (Decrease) in Accounts Payable and Accrued Liabilities Income tax expense Income Tax Expense (Benefit) Income Statement [Abstract] Income Statement [Abstract] Domestic wireless Domestic Wireless [Member] Domestic Wireless 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. Costs and Expenses: Costs and Expenses [Abstract] Title of 12(b) Security Title of 12(b) Security Goodwill gross, beginning of the period Goodwill gross, end of the period Goodwill, Gross Less: Other comprehensive income (loss) attributable to noncontrolling interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Operating Segments Operating Segments [Member] Equity [Abstract] Issuances of common stock under employee plans Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Other current assets Other Assets, Current Amendment Flag Amendment Flag Other Other Programming And Production Expense Other Programming And Production Expense Schedule of Receivables, Net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Licensed, including sports rights Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Amortization Expense Amount of amortization expense for rights acquired by broadcaster under license agreement for program material, including sports rights advances. Schedule of 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. Entity Tax Identification Number Entity Tax Identification Number Equity method Equity Method Investments Fair value of collateralized obligation Collateralized Obligation, Fair Value Fair value of obligation presented separately as collateralized obligation that is secured by assets. Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Other Investments Other Investments [Member] Financial Instrument [Axis] Financial Instrument [Axis] Entity Interactive Data Current Entity Interactive Data Current Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Completed, not released Film, Monetized on Its Own, Capitalized Cost, Completed and Not Released Hulu Hulu [Member] Hulu member. Repurchases of common stock under repurchase program and employee plans Payments for Repurchase of Common Stock Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Weighted-average number of common shares outstanding – diluted Weighted Average Number of Shares Outstanding, Diluted Inter-Business Unit Eliminations Inter-Business Unit Eliminations [Member] Inter-Business Unit Eliminations Employee benefit obligations and other, deferred taxes Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Segments [Domain] Segments [Domain] Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Consolidation Items [Domain] Consolidation Items [Domain] Retained earnings Retained Earnings (Accumulated Deficit) Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Proceeds from short-term instruments Proceeds from Sale of Short-Term Investments Revenue Revenue from Contract with Customer [Text Block] Capital expenditures Payments to Acquire Property, Plant, and Equipment Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Additional Paid-In Capital Additional Paid-in Capital [Member] Deferred gains (losses), net of deferred taxes of $(19), $4, $4 and $(34) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Current Assets: Assets, Current [Abstract] Receivables, gross Accounts Receivable, before Allowance for Credit Loss, Current Marketable equity securities Equity Securities, FV-NI Principal amount of term loan outstanding Other Long-Term Debt Total assets Assets Assets Equity in net income (losses) of investees, net Income (Loss) from Equity Method Investments Entity Address, State or Province Entity Address, State or Province Cover [Abstract] Cover [Abstract] Segment change Goodwill, Transfers Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Common stock, shares outstanding at end of period (in shares) Common Stock, Shares, Outstanding Segment Reconciling Items Segment Reconciling Items [Member] Schedule of 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. Other investments Other Investments Owned Film, Monetized on Its Own, Capitalized Cost Other noncurrent liabilities Other Liabilities, Noncurrent Dividends paid Payments of Dividends Schedule of Cash Payments for Interest and Income Taxes Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Less: Current investments Short-Term Investments Other Stockholders' Equity, Other Segment Information Segment Reporting Disclosure [Text Block] 0.250% Notes due 2027 Notes 0.250 percent Due 2027 [Member] Notes 0.250% Due 2027 [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Business Services Connectivity Business Services Connectivity Segment [Member] Business Services Connectivity Segment Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Accrued participations and residuals Accrued Participation Liabilities, Due in Next Operating Cycle Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Licensed, including sports advances Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Capitalized Cost Amount of capitalized cost for rights acquired by broadcaster under license agreement for program material, including sports rights advances. Equity Component [Domain] Equity Component [Domain] Goodwill and long-lived asset impairments Goodwill and long-lived asset impairments Goodwill and long-lived asset impairments Goodwill and Intangible Asset Impairment Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Class of Stock [Domain] Class of Stock [Domain] International connectivity International Connectivity [Member] International Connectivity Studios Studios Segment [Member] Studios Segment Video Video [Member] Video Debt Instrument [Axis] Debt Instrument [Axis] Collateralized obligation Collateralized obligation Collateralized Obligation, Noncurrent Carrying amount of obligation presented separately as collateralized obligation that is secured by assets. Weighted-average number of common shares outstanding – basic Weighted Average Number of Shares Outstanding, Basic Billing Status, Type [Axis] Billing Status, Type [Axis] Collateralized obligation Collateralized Obligation, Current Collateralized Obligation, Current Repurchases of common stock under repurchase program and employee plans Stock Repurchased and Retired During Period, Value Entity Current Reporting Status Entity Current Reporting Status Operating income (loss) Operating Income (Loss) Adjusted EBITDA Adjusted EBITDA Adjusted EBITDA The measure used to evaluate the profitability of operating segments. Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Consolidated variable interest entity's liabilities included in condensed consolidated balance sheet Liabilities Revenues [Abstract] Revenues [Abstract] Video distribution programming Video Distribution Programming Expense Video Distribution Programming Expense Consolidated Entities [Domain] Consolidated Entities [Domain] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Amortization of owned film and television costs Film, Monetized on Its Own, Amortization Expense Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Unrecognized gains (losses) on employee benefit obligations and other Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Plan Name [Axis] Plan Name [Axis] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Number of reportable segments Number of Reportable Segments Common stock Common Stock, Value, Issued Adjustments Adjustments for Items Excluded from Adjusted EBITDA Adjustments represent the impacts of certain events, gains, losses or other charges that are excluded from Adjusted EBITDA Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Noncontrolling Interests Noncontrolling Interest [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract]