Consolidated Statement of Shareholder's Interest - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2021
Shareholder's Interest [Roll Forward]
Balance at beginning of period	$ 11,877
Net income	240	$ 669
Other Comprehensive Income (Loss), Net of Tax	88	152
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance	11,877	12,398
Distributions declared	0	(1,000)
Stockholders' Equity, Other		(83)
Balance at end of period	12,205
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance	12,205	12,136
SHAREHOLDER’S INTEREST	0
Shareholder's Interest [Member]
Shareholder's Interest [Roll Forward]
Balance at beginning of period	5,166	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	5,166
Accumulated Other Comprehensive Income/(Loss) (Note11) [Member]
Shareholder's Interest [Roll Forward]
Balance at beginning of period	(1,017)	(690)
Net income	0	0
Other Comprehensive Income (Loss), Net of Tax	88	152
Distributions declared	0	0
Stockholders' Equity, Other		0
Balance at end of period	(929)	(538)
Retained Earnings [Member]
Shareholder's Interest [Roll Forward]
Balance at beginning of period	7,728	7,839
Other Comprehensive Income (Loss), Net of Tax	0	0
Distributions declared	0	(1,000)
Stockholders' Equity, Other		0
Balance at end of period	7,968	7,508
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
Parent [Member]
Shareholder's Interest [Roll Forward]
Net income	240	669
Other Comprehensive Income (Loss), Net of Tax	88	152
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance		12,376
Distributions declared	0	(1,000)
Stockholders' Equity, Other		(61)
Balance at end of period	$ 12,205
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance		$ 12,136