CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
REVENUES
Total revenue		$ 20,972	$ 20,758	$ 20,452
OPERATING COSTS AND EXPENSES
Depreciation, amortization, and other	[1]	341	226	229
General, administrative, and other	[1]	938	927	921
Merger-related costs and charges		138	155	159
Costs and Expenses, Total		19,172	18,392	17,948
OPERATING INCOME		1,800	2,366	2,504
Gains and other income, net	[1]	154	194	688
Interest expense (1)	[1]	(394)	(340)	(288)
Interest income	[1]	26	22	38
Equity in earnings	[1]	13	103	40
INCOME BEFORE INCOME TAXES		1,599	2,345	2,982
Provision for income taxes		(326)	(438)	(1,523)
NET INCOME		$ 1,273	$ 1,907	$ 1,459
EARNINGS PER SHARE
Earnings per share - basic (in USD per share)		$ 3.83	$ 5.45	$ 3.89
Earnings per share - diluted (in USD per share)		$ 3.80	$ 5.38	$ 3.84
Base management fees
REVENUES
Gross fee revenues	[1]	$ 1,180	$ 1,140	$ 1,102
Franchise fees
REVENUES
Gross fee revenues		2,006	1,849	1,586
Incentive management fees
REVENUES
Gross fee revenues	[1]	637	649	607
Net fee revenues
REVENUES
Gross fee revenues		3,823	3,638	3,295
Contract investment amortization	[1]	(62)	(58)	(50)
Total revenue		3,761	3,580	3,245
Owned, leased, and other
REVENUES
Total revenue	[1]	1,612	1,635	1,752
OPERATING COSTS AND EXPENSES
Cost of revenues		1,316	1,306	1,411
Reimbursements
REVENUES
Total revenue	[1]	15,599	15,543	15,455
OPERATING COSTS AND EXPENSES
Cost of revenues	[1]	$ 16,439	$ 15,778	$ 15,228

[1] See Note 16 for disclosure of related party amounts.