Consolidated Statement of Shareholder's Interest - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Shareholder's Interest [Roll Forward]
Balance at beginning of period		$ 12,376			$ 12,376
Net income	$ (804)	(669)	$ (1,651)	$ (845)	(1,473)	$ (2,496)
Other Comprehensive Income (Loss), Net of Tax	(367)	152	108	(101)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance	12,136	12,398	15,311	15,567	12,398	15,567
Distributions declared	(600)	(1,000)	(4,000)	(1,000)
Stockholders' Equity, Other		(83)
Balance at end of period	11,973				11,973
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance	11,973	12,136	13,070	15,311	11,973	13,070
SHAREHOLDER’S INTEREST	0				0		$ 22
Shareholder's Interest [Member]
Shareholder's Interest [Roll Forward]
Balance at beginning of period	5,166	5,227	5,227	5,227	5,227	5,227
Net income	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0
Distributions declared	0	0	0	0
Stockholders' Equity, Other		(61)
Balance at end of period	5,166	5,166	5,227	5,227	5,166	5,227
Accumulated Other Comprehensive Income/(Loss) (Note11) [Member]
Shareholder's Interest [Roll Forward]
Balance at beginning of period	(538)	(690)	(579)	(478)	(690)	(478)
Net income	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	(367)	152	108	(101)
Distributions declared	0	0	0	0
Stockholders' Equity, Other		0
Balance at end of period	(905)	(538)	(471)	(579)	(905)	(471)
Retained Earnings [Member]
Shareholder's Interest [Roll Forward]
Balance at beginning of period	7,508	7,839	10,663	10,818	7,839	10,818
Net income		(669)	1,651	845
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0
Distributions declared	(600)	(1,000)	(4,000)	(1,000)
Stockholders' Equity, Other		0
Balance at end of period	7,712	7,508	8,314	10,663	7,712	8,314
Noncontrolling Interest
Shareholder's Interest [Roll Forward]
Net income	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0
Distributions declared	0	0	0	0
Stockholders' Equity, Other		(22)
SHAREHOLDER’S INTEREST	0	0	0	0	0	0	$ 22	$ 0
Parent [Member]
Shareholder's Interest [Roll Forward]
Balance at beginning of period	12,136	12,376			12,376
Net income	(804)	(669)	(1,651)	(845)
Other Comprehensive Income (Loss), Net of Tax	(367)	152	108	(101)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance			15,311	15,567		15,567
Distributions declared	(600)	(1,000)	(4,000)	(1,000)
Stockholders' Equity, Other		(61)
Balance at end of period	$ 11,973	$ 12,136			$ 11,973
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance			$ 13,070	$ 15,311		$ 13,070