CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 44	$ 45	$ 108	$ 112
Other comprehensive income
Change in fair value of cash flow hedges (Note 12)		(1)	(1)	(1)
Comprehensive income	44	44	107	111
Comprehensive income attributable to non-controlling interests		8	7	18
Comprehensive income attributable to controlling interests	$ 44	$ 36	$ 100	$ 93