CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions		Total	Class A Common Stock Class A Common Stock		Additional Paid-in- Capital	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2015		$ (3,590)	$ 5		$ 2,821	$ 4,878	$ (11,098)	$ (196)
Beginning balance (in shares) at Dec. 31, 2015			256,300,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		808				808
Total other comprehensive (loss) income, net of tax		(301)						(301)
Dividends		(374)				(374)
Share-based compensation plans (in shares)			1,800,000
Share-based compensation plans		146			110	(21)	57
Purchase of treasury stock		(573)					(573)
Purchase of treasury stock (in shares)			(8,000,000)
Starwood Combination	[1]	9,269	$ 0		2,877	1,238	5,154	0
Starwood Combination (in shares)	[1]		136,000,000
Ending balance at Dec. 31, 2016		5,121	$ 5		5,808	6,265	(6,460)	(497)
Ending balance (in shares) at Dec. 31, 2016			386,100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,459				1,459
Total other comprehensive (loss) income, net of tax		480						480
Dividends		(482)				(482)
Share-based compensation plans (in shares)			2,200,000
Share-based compensation plans		29			(38)	0	67
Purchase of treasury stock		(3,025)					(3,025)
Purchase of treasury stock (in shares)			(29,200,000)
Ending balance at Dec. 31, 2017		3,582	$ 5		5,770	7,242	(9,418)	(17)
Ending balance (in shares) at Dec. 31, 2017			359,100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,907
Total other comprehensive (loss) income, net of tax		(370)						(370)
Dividends		(543)				(543)
Share-based compensation plans (in shares)			1,500,000
Share-based compensation plans		86			44	0	42
Purchase of treasury stock		(2,809)					(2,809)
Purchase of treasury stock (in shares)			(21,500,000)
Ending balance at Dec. 31, 2018		$ 2,225	$ 5		$ 5,814	$ 8,982	$ (12,185)	$ (391)
Ending balance (in shares) at Dec. 31, 2018		339,100,000	339,100,000	[2]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, authorized (in shares)		800,000,000
Common stock, par value (in USD per share)		$ 0.01
Preferred stock, authorized (in shares)		10,000,000
Preferred stock, outstanding (in shares)		0

[1] Represents Marriott common stock and equity-based awards issued in the Starwood Combination, which also resulted in the depletion of our accumulated historical losses on reissuances of treasury stock in Retained Earnings.

[2] Our restated certificate of incorporation authorizes 800 million shares of our common stock, with a par value of $.01 per share and 10 million shares of preferred stock, without par value. At year-end 2018, we had 339.1 million of these authorized shares of our common stock and no preferred stock outstanding.