Income Tax Provision Calculated at Statutory U.S. Federal Income Tax Rate and Actual Income Tax Provision Recorded (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Statutory federal income tax provision	$ 284	$ 204	$ 265
Adjustment for nontaxable income of Host Inc.	(260)	(203)	(268)
State income tax provision, net	7	1	1
Provision for uncertain tax positions		1	5
Foreign income tax provision	9	6	11
Income tax provision – continuing operations	$ 40	$ 9	$ 14