CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) $ in Millions	Total	ILG, Inc	Welk	Previously Reported	Revision of Prior Period, Accounting Standards Update, Adjustment	Total MVW Shareholders' Equity	Total MVW Shareholders' Equity Welk	Total MVW Shareholders' Equity Previously Reported	Total MVW Shareholders' Equity Revision of Prior Period, Accounting Standards Update, Adjustment	Common Stock	Common Stock Previously Reported	Treasury Stock	Treasury Stock Welk	Treasury Stock Previously Reported	Additional Paid-In Capital	Additional Paid-In Capital Welk	Additional Paid-In Capital Previously Reported	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Previously Reported	Retained Earnings	Retained Earnings Previously Reported	Retained Earnings Revision of Prior Period, Accounting Standards Update, Adjustment	Noncontrolling Interests	Noncontrolling Interests ILG, Inc	Noncontrolling Interests Previously Reported
Beginning balance (in shares) at Dec. 31, 2018										57,600,000
Beginning balance at Dec. 31, 2018	$ 3,458			$ 3,466	$ (8)	$ 3,453		$ 3,461	$ (8)	$ 1	$ 1	$ (790)		$ (790)	$ 3,721		$ 3,721	$ 6	$ 6	$ 515	$ 523	$ (8)	$ 5		$ 5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	142					138														138			4
Acquisition		$ 3																						$ 3
Foreign currency translation adjustments	(27)					(27)												(27)
Derivative instrument adjustment	(15)					(15)												(15)
Amounts related to share-based compensation (in shares)										300,000
Amounts related to share-based compensation	16					16									16
Repurchase of common stock	(465)					(465)						(465)
Dividends	(84)					(84)														(84)
Tax restructuring transaction (in shares)										17,100,000
Tax restructuring transaction	0
Employee stock plan issuance	3					3						2			1
Ending balance (in shares) at Dec. 31, 2019											75,000,000.0
Ending balance at Dec. 31, 2019	3,031					3,019				$ 1		(1,253)			3,738			(36)		569			12
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(256)					(275)														(275)			19
Foreign currency translation adjustments	6					6												6
Derivative instrument adjustment	(18)					(18)												(18)
Amounts related to share-based compensation (in shares)										300,000
Amounts related to share-based compensation	21					21									21
Repurchase of common stock	(82)					(82)						(82)
Dividends	(22)					(22)														(22)
Employee stock plan issuance	$ 2					2						1			1
Ending balance (in shares) at Dec. 31, 2020	75,279,061									75,300,000
Ending balance at Dec. 31, 2020	$ 2,682					2,651				$ 1		(1,334)			3,760			(48)		272			31
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	53					49														49			4
Acquisition			$ 248				$ 248						$ 55			$ 193
Foreign currency translation adjustments	11					11												11
Derivative instrument adjustment	21					21												21
Amounts related to share-based compensation (in shares)										200,000
Amounts related to share-based compensation	30					30						1			29
Equity component of convertible notes, net of issuance costs	117					117									117
Purchase of convertible note hedges	(100)					(100)									(100)
Issuance of warrants	70					70									70
Repurchase of common stock	(78)					(78)						(78)
Dividends	(46)					(46)														(46)
Employee stock plan issuance	3					3									3
Deconsolidation of certain Consolidated Property Owners' Associations	$ (25)																						(25)
Ending balance (in shares) at Dec. 31, 2021	75,519,049									75,500,000
Ending balance at Dec. 31, 2021	$ 2,986					$ 2,976				$ 1		$ (1,356)			$ 4,072			$ (16)		$ 275			$ 10
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-02 [Member]