Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 90	$ 99
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	25	(112)
Defined benefit pension and postretirement plans activity	1	1
Hedging activities	(3)	1
Total other comprehensive income (loss), net of taxes	23	(110)
Total comprehensive income (loss)	113	(11)
Comprehensive income (loss) attributable to Starwood	$ 113	$ (11)