Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions			12 Months Ended
	Dec. 31, 2023 USD ($)	Nov. 30, 2022 USD ($)	Sep. 28, 2024 USD ($) derivatives	Sep. 30, 2023 USD ($)	Oct. 01, 2022 USD ($)	May 31, 2024 USD ($)	Nov. 30, 2023 USD ($)
Indefinite-lived Intangible Assets [Line Items]
Advertising expense			$ 6,100	$ 6,400	$ 7,200
Ultimate Revenue from Theatrical Release Maximum Period			10 years
Ultimate Revenues from TV Series Delivery of First Episode Maximum Period			10 years
Ultimate Revenues from TV Series Delivery of Recent Episode Maximum Period			5 years
Amortization of Film Library Maximum Period			20 years
Internal-Use software costs capitalized, net of accumulated depreciation			$ 1,300	1,200
Number of Types of Derivatives | derivatives			2
Hulu LLC
Indefinite-lived Intangible Assets [Line Items]
Equity Method Investment, Ownership Interest			67.00%
Equity Interest Held by NBC Universal | Hulu LLC
Indefinite-lived Intangible Assets [Line Items]
Equity Method Investment, Ownership Interest							33.00%
Percentage of Tax Benefit Shared Arising from Noncontrolling Interest Acquisition							50.00%
Tax Benefit Amortization Period Arising from Noncontrolling Interest Acquisition							15 years
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	$ 8,600
Equity Interest Held by NBC Universal | Hulu LLC | Pro Forma
Indefinite-lived Intangible Assets [Line Items]
Redeemable Noncontrolling Interest, Equity, Redemption Value						$ 5,000
MLB | BAMTech, LLC
Indefinite-lived Intangible Assets [Line Items]
Equity Method Investment, Ownership Interest		15.00%
Redeemable Noncontrolling Interest, Equity, Redemption Value		$ 900			$ 828
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest		$ 72
Hearst Corporation | Domestic DTC Sports Business
Indefinite-lived Intangible Assets [Line Items]
Contribution to Subsdiary, Noncontrolling Owner				$ 710
Effective ownership interest by noncontrolling owners				20.00%
Minimum
Indefinite-lived Intangible Assets [Line Items]
Amortizable intangible assets, amortization period			5 years
Minimum | Equity Interest Held by NBC Universal | Hulu LLC
Indefinite-lived Intangible Assets [Line Items]
Redeemable Noncontrolling Interest, Equity, Redemption Value							$ 27,500
Minimum | Equity Interest Held by NBC Universal | Hulu LLC | Appraisal Fair Value Between the Company and NBCU
Indefinite-lived Intangible Assets [Line Items]
Redeemable Noncontrolling Interest, Equity, Redemption Value						0
Maximum
Indefinite-lived Intangible Assets [Line Items]
Amortizable intangible assets, amortization period			40 years
Maximum | Equity Interest Held by NBC Universal | Hulu LLC | Appraisal Fair Value Between the Company and NBCU
Indefinite-lived Intangible Assets [Line Items]
Redeemable Noncontrolling Interest, Equity, Redemption Value						$ 5,000
Attractions, Buildings and Improvements | Minimum
Indefinite-lived Intangible Assets [Line Items]
Property, Plant and Equipment, Useful Life			20 years
Attractions, Buildings and Improvements | Maximum
Indefinite-lived Intangible Assets [Line Items]
Property, Plant and Equipment, Useful Life			40 years
Software and Software Development Costs | Maximum
Indefinite-lived Intangible Assets [Line Items]
Property, Plant and Equipment, Useful Life			5 years