ACQUISITIONS AND DISPOSITIONS - Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Apr. 01, 2021	Dec. 31, 2021	Dec. 31, 2020
Business Combination, Provisional Information [Abstract]
Goodwill		$ 3,150	$ 2,817
Welk
Business Combination, Provisional Information [Abstract]
Vacation ownership notes receivable, net	$ 255
Inventory	111
Property and equipment	83
Intangible assets	102
Other assets	19
Deferred taxes	(32)
Debt	(189)
Securitized debt	(184)
Other liabilities	(93)
Net assets acquired	72
Goodwill	333
Assets acquired	405
Vacation ownership notes receivable	287
Allowance for credit losses	$ (32)
Welk | Minimum | Management contracts
Business Combination, Provisional Information [Abstract]
Estimated useful life	20 years
Welk | Previously Reported
Business Combination, Provisional Information [Abstract]
Vacation ownership notes receivable, net	$ 254
Inventory	136
Property and equipment	111
Intangible assets	100
Other assets	19
Deferred taxes	(45)
Debt	(189)
Securitized debt	(184)
Other liabilities	(66)
Net assets acquired	136
Goodwill	269
Assets acquired	405
Welk | Revision of Prior Period, Adjustment
Business Combination, Provisional Information [Abstract]
Vacation ownership notes receivable, net	1
Inventory	(25)
Property and equipment	(28)
Intangible assets	2
Deferred taxes	13
Other liabilities	(27)
Net assets acquired	(64)
Goodwill	64
Assets acquired	$ 0