CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 301	$ 298	$ (165)
Other comprehensive income (loss)
Change in fair value of cash flow hedges (Notes 11 and 19)	(16)	(13)	(2)
Reclassification to net income of gains and losses on cash flow hedges (Notes 11 and 19)	7	(1)	5
Amortization of realized loss on derivative instrument (Notes 11 and 19)	0	0	1
Other comprehensive income (loss) on equity investments (Note 11)	1	1	(1)
Comprehensive income (loss)	293	285	(162)
Comprehensive income attributable to non-controlling interests	17	18	17
Comprehensive income (loss) attributable to controlling interests	$ 276	$ 267	$ (179)