CONSOLIDATED STATEMENTS OF MEMBER'S EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	MEMBER'S EQUITY	MEMBER'S EQUITY Cumulative Effect, Period of Adoption, Adjustment	ACCUMULATED OTHER COMPREHENSIVE LOSS
Balance at beginning of period at Dec. 31, 2019		$ 13,724	$ (3)	$ (179)
MEMBER'S EQUITY
Net income	$ 486	486
Distributions		(1,118)
Other		7
Other comprehensive (loss) income	(179)			(179)
Balance at end of period at Sep. 30, 2020	12,738	13,096		(358)
Balance at beginning of period at Jun. 30, 2020		13,301		(399)
MEMBER'S EQUITY
Net income	197	197
Distributions		(400)
Other		(2)
Other comprehensive (loss) income	41			41
Balance at end of period at Sep. 30, 2020	12,738	13,096		(358)
Balance at beginning of period at Dec. 31, 2020	12,905	13,139		(234)
MEMBER'S EQUITY
Net income	419	419
Distributions		(25)
Other		(1)
Other comprehensive (loss) income	(101)			(101)
Balance at end of period at Sep. 30, 2021	13,197	13,532		(335)
Balance at beginning of period at Jun. 30, 2021		13,412		(242)
MEMBER'S EQUITY
Net income	121	121
Distributions		0
Other		(1)
Other comprehensive (loss) income	(93)			(93)
Balance at end of period at Sep. 30, 2021	$ 13,197	$ 13,532		$ (335)