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