RELATED PARTY TRANSACTIONS - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party Transactions [Abstract]
Carrying amount of equity method investments	$ 308	$ 335
Amount by which the fair value of equity method investments exceeds company's share of the book value of the investee's net assets	231	238
Gross fee revenues
Related Party Transaction [Line Items]
Fees earned	4,824	4,078	$ 2,694
Related Party | Management fees | JWM Family Enterprise, L.P.
Related Party Transaction [Line Items]
Fees earned	13	11	6
Related Party | Gross fee revenues | Affiliated Members Of The Marriott Family
Related Party Transaction [Line Items]
Fees earned	$ 4	$ 4	$ 1