CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 27	$ 184	$ 73	$ 207
Other comprehensive income, net of tax:
Foreign currency translation adjustments, net of tax	9	(10)	15	(14)
Total comprehensive income, net of tax	36	174	88	193
Less: Net income attributable to noncontrolling interests, net of tax		(1)	(1)	(1)
Less: Other comprehensive income attributable to noncontrolling interests	(1)	(2)	(2)	(3)
Total comprehensive income attributable to noncontrolling interests	(1)	(3)	(3)	(4)
Comprehensive income attributable to common stockholders	$ 35	$ 171	$ 85	$ 189