Investments and Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Unrealized gains (losses) recognized	$ (70)	$ (24)
Cash distribution received from equity method investments	32	20
Other investments	562		$ 559
Assets	263,601		264,811
Short-Term Instruments
Schedule of Equity Method Investments [Line Items]
Other investments	259		254
Other Investments
Schedule of Equity Method Investments [Line Items]
Proceeds from short-term instruments	255	304
Purchase of short-term instruments	$ 257	0
Variable Interest Entity, Primary Beneficiary | Universal Beijing Resort
Schedule of Equity Method Investments [Line Items]
Ownership percentage in variable interest entity	30.00%
Long-term debt	$ 3,500		3,500
Assets	7,500		7,800
Consolidated variable interest entity's liabilities included in condensed consolidated balance sheet	7,100		7,200
Variable Interest Entity, Primary Beneficiary | Universal Beijing Resort | Universal Beijing Resort Term Loans
Schedule of Equity Method Investments [Line Items]
Long-term debt	3,100		3,100
Atairos
Schedule of Equity Method Investments [Line Items]
Cash capital contributions for equity method investments	13	$ 14
Equity method investments and certain retained distributions	5,700		$ 5,500
Atairos | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Remaining unfunded capital commitment	$ 1,400