CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 49	$ 39	$ 157	$ 151
Other comprehensive income
Change in fair value of cash flow hedges (Note 12)	(1)		(2)	(1)
Comprehensive income	48	39	155	150
Comprehensive income attributable to non-controlling interests		8	7	26
Comprehensive income attributable to controlling interests	$ 48	$ 31	$ 148	$ 124