CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
REVENUES
Base management fees	$ 285	$ 186	$ 549	$ 358
Franchise fees	416	273	781	523
Incentive management fees	148	94	301	195
Management and franchise fees	849	553	1,631	1,076
Owned, leased, and other revenue	458	207	897	411
Cost reimbursements	4,488	3,142	8,828	6,187
Revenues	5,795	3,902	11,356	7,674
OPERATING COSTS AND EXPENSES
Owned, leased, and other - direct	355	173	713	339
Reimbursed costs	4,488	3,142	8,828	6,187
Depreciation, amortization, and other	85	30	150	61
General, administrative, and other	226	154	436	309
Merger-related costs and charges	21	14	72	22
Costs and Expenses, Total	5,175	3,513	10,199	6,918
OPERATING INCOME	620	389	1,157	756
Gains and other income, net	25	0	25	0
Interest expense	(73)	(57)	(143)	(104)
Interest income	8	7	15	13
Equity in earnings	12	5	23	5
INCOME BEFORE INCOME TAXES	592	344	1,077	670
Provision for income taxes	(178)	(97)	(298)	(204)
NET INCOME	$ 414	$ 247	$ 779	$ 466
EARNINGS PER SHARE
Earnings per share - basic (in USD per share)	$ 1.09	$ 0.97	$ 2.04	$ 1.83
Earnings per share - diluted (in USD per share)	1.08	0.96	2.02	1.80
CASH DIVIDENDS DECLARED PER SHARE (in USD per share)	$ 0.33	$ 0.30	$ 0.63	$ 0.55