CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ 298	$ (165)	$ 263
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	(13)	(2)	5
Reclassification to net income of gains and losses on cash flow hedges (Notes 12 and 20)	(1)	5
Amortization of realized loss on derivative instrument (Notes 12 and 20)		1	1
Other comprehensive income (loss) on equity investments (Note 12)	1	(1)	1
Comprehensive income (loss)	285	(162)	270
Comprehensive income attributable to non-controlling interests	18	17	11
Comprehensive income (loss) attributable to controlling interests	$ 267	$ (179)	$ 259