Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (263)	$ 136	$ (173)	$ 235
Other comprehensive income, net of taxes:
Foreign currency translation adjustments	175	23	200	(89)
Defined benefit pension and postretirement plans activity			1	1
Hedging activities	2	(3)	(1)	(2)
Total other comprehensive income (loss), net of taxes	177	20	200	(90)
Total comprehensive income (loss)	(86)	156	27	145
Comprehensive income (loss) attributable to Starwood	$ (86)	$ 156	$ 27	$ 145