CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
REVENUES
Revenues	$ 5,346	$ 5,211	$ 10,352	$ 10,123
OPERATING COSTS AND EXPENSES
Depreciation, amortization, and other	58	71	112	122
General, administrative, and other	217	234	464	446
Merger-related costs and charges	18	21	52	72
Costs and expenses	4,606	4,467	9,112	8,833
OPERATING INCOME	740	744	1,240	1,290
Gains and other income, net	114	25	173	25
Interest expense	(85)	(73)	(160)	(143)
Interest income	6	8	11	15
Equity in earnings	21	12	34	23
INCOME BEFORE INCOME TAXES	796	716	1,298	1,210
Provision for income taxes	(186)	(227)	(290)	(350)
NET INCOME	$ 610	$ 489	$ 1,008	$ 860
EARNINGS PER SHARE
Earnings per share - basic (in USD per share)	$ 1.73	$ 1.29	$ 2.83	$ 2.25
Earnings per share - diluted (in USD per share)	1.71	1.28	2.80	2.23
CASH DIVIDENDS DECLARED PER SHARE (in USD per share)	$ 0.41	$ 0.33	$ 0.74	$ 0.63
Base management fees
REVENUES
Gross revenues	$ 300	$ 285	$ 573	$ 549
Franchise fees
REVENUES
Gross revenues	475	408	892	763
Incentive management fees
REVENUES
Gross revenues	176	155	331	295
Fee revenues
REVENUES
Gross revenues	951	848	1,796	1,607
Contract investment amortization	(13)	(12)	(31)	(23)
Revenues	938	836	1,765	1,584
Owned, leased, and other
REVENUES
Revenues	423	448	829	876
OPERATING COSTS AND EXPENSES
Operating costs	334	350	670	706
Reimbursements
REVENUES
Revenues	3,985	3,927	7,758	7,663
OPERATING COSTS AND EXPENSES
Operating costs	$ 3,979	$ 3,791	$ 7,814	$ 7,487