CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
REVENUES
Revenues	$ 5,049	$ 5,078	$ 15,401	$ 15,201
OPERATING COSTS AND EXPENSES
Depreciation, amortization, and other	52	54	164	176
General, administrative, and other	221	205	685	651
Merger-related costs and charges	12	28	64	100
Costs and expenses	4,479	4,288	13,591	13,121
OPERATING INCOME	570	790	1,810	2,080
Gains and other income, net	18	6	191	31
Interest expense	(86)	(73)	(246)	(216)
Interest income	5	9	16	24
Equity in earnings	61	6	95	29
INCOME BEFORE INCOME TAXES	568	738	1,866	1,948
Provision for income taxes	(85)	(253)	(375)	(603)
NET INCOME	$ 483	$ 485	$ 1,491	$ 1,345
EARNINGS PER SHARE
Earnings per share - basic (in USD per share)	$ 1.39	$ 1.30	$ 4.23	$ 3.55
Earnings per share - diluted (in USD per share)	1.38	1.29	4.18	3.51
CASH DIVIDENDS DECLARED PER SHARE (in USD per share)	$ 0.41	$ 0.33	$ 1.15	$ 0.96
Base management fees
REVENUES
Gross revenues	$ 279	$ 269	$ 852	$ 818
Franchise fees
REVENUES
Gross revenues	502	419	1,394	1,182
Incentive management fees
REVENUES
Gross revenues	151	138	482	433
Fee revenues
REVENUES
Gross revenues	932	826	2,728	2,433
Contract investment amortization	(13)	(11)	(44)	(34)
Revenues	919	815	2,684	2,399
Owned, leased, and other
REVENUES
Revenues	397	433	1,226	1,309
OPERATING COSTS AND EXPENSES
Operating costs	315	351	985	1,057
Reimbursements
REVENUES
Revenues	3,733	3,830	11,491	11,493
OPERATING COSTS AND EXPENSES
Operating costs	$ 3,879	$ 3,650	$ 11,693	$ 11,137