INTERIM CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY - USD ($) $ in Millions	Total	Previously Reported	Revision of Prior Period, Accounting Standards Update, Adjustment	Common Stock	Common Stock Previously Reported	Treasury Stock	Treasury Stock Previously Reported	Additional Paid-In Capital	Additional Paid-In Capital Previously Reported	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Previously Reported	Retained Earnings	Retained Earnings Previously Reported	Retained Earnings Revision of Prior Period, Accounting Standards Update, Adjustment	Total MVW Shareholders' Equity	Total MVW Shareholders' Equity Previously Reported	Total MVW Shareholders' Equity Revision of Prior Period, Accounting Standards Update, Adjustment	Noncontrolling Interests	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)	$ 1	$ 1	$ (790)	$ (790)	$ 3,721	$ 3,721	$ 6	$ 6	$ 515	$ 523	$ (8)	$ 3,453	$ 3,461	$ (8)	$ 5	$ 5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	24											24			24
Foreign currency translation adjustments	1									1					1
Derivative instrument adjustment	(3)									(3)					(3)
Amounts related to share-based compensation (in shares)				200,000
Share-based compensation plans	(4)							(4)							(4)
Repurchase of common stock (in shares)				0
Repurchase of common stock	(106)					(106)									(106)
Dividends	(20)											(20)			(20)
Employee stock plan issuance	1					1		0							1
Ending balance (in shares) at Mar. 31, 2019				57,800,000
Ending balance at Mar. 31, 2019	3,351			$ 1		(895)		3,717		4		519			3,346			5
Beginning balance (in shares) at Dec. 31, 2018				57,600,000
Beginning balance at Dec. 31, 2018	3,458	$ 3,466	$ (8)	$ 1	$ 1	(790)	$ (790)	3,721	$ 3,721	6	$ 6	515	$ 523	$ (8)	3,453	$ 3,461	$ (8)	5	$ 5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	73
Foreign currency translation adjustments	(1)
Derivative instrument adjustment	(16)
Employee stock plan issuance	0					0		0							0
Ending balance (in shares) at Jun. 30, 2019				57,900,000
Ending balance at Jun. 30, 2019	3,270			$ 1		(1,004)		3,730		(11)		548			3,264			6
Beginning balance (in shares) at Mar. 31, 2019				57,800,000
Beginning balance at Mar. 31, 2019	3,351			$ 1		(895)		3,717		4		519			3,346			5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	49											49			49
ILG Acquisition purchase accounting adjustment																		1
ILG Acquisition purchase accounting adjustment	1
Foreign currency translation adjustments	(2)									(2)					(2)
Derivative instrument adjustment	(13)									(13)					(13)
Share-based compensation plans	13							13							13
Repurchase of common stock	(109)					(109)									(109)
Dividends	(20)											(20)			(20)
Employee stock plan issuance (in shares)				100,000
Ending balance (in shares) at Jun. 30, 2019				57,900,000
Ending balance at Jun. 30, 2019	3,270			$ 1		(1,004)		3,730		(11)		548			3,264			6
Beginning balance (in shares) at Dec. 31, 2019				75,000,000.0
Beginning balance at Dec. 31, 2019	3,031			$ 1		(1,253)		3,738		(36)		569			3,019			12
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(105)											(106)			(106)			1
Foreign currency translation adjustments	(17)									(17)					(17)
Derivative instrument adjustment	(24)									(24)					(24)
Share-based compensation plans	(9)							(9)							(9)
Repurchase of common stock	(82)					(82)									(82)
Dividends	(22)											(22)			(22)
Ending balance (in shares) at Mar. 31, 2020				75,200,000
Ending balance at Mar. 31, 2020	2,772			$ 1		(1,335)		3,729		(77)		441			2,759			13
Beginning balance (in shares) at Dec. 31, 2019				75,000,000.0
Beginning balance at Dec. 31, 2019	3,031			$ 1		$ (1,253)		3,738		(36)		569			3,019			12
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(167)
Foreign currency translation adjustments	(14)
Derivative instrument adjustment	(25)
Repurchase of common stock (in shares)						769,935
Repurchase of common stock						$ (82)
Ending balance (in shares) at Jun. 30, 2020				75,200,000
Ending balance at Jun. 30, 2020	$ 2,720			$ 1		(1,334)		3,736		(75)		371			2,699			21
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Impact of adoption of ASU 2016-02	us-gaap:AccountingStandardsUpdate201602Member
Beginning balance (in shares) at Mar. 31, 2020				75,200,000
Beginning balance at Mar. 31, 2020	$ 2,772			$ 1		(1,335)		3,729		(77)		441			2,759			13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(62)											(70)			(70)			8
Foreign currency translation adjustments	3									3					3
Derivative instrument adjustment	(1)									(1)					(1)
Amounts related to share-based compensation (in shares)				200,000
Share-based compensation plans	7							7							7
Repurchase of common stock (in shares)				0
Employee stock plan issuance	1					1		0							1
Ending balance (in shares) at Jun. 30, 2020				75,200,000
Ending balance at Jun. 30, 2020	$ 2,720			$ 1		$ (1,334)		$ 3,736		$ (75)		$ 371			$ 2,699			$ 21