Consolidated Statement of Shareholder's Interest - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Shareholder's Interest [Roll Forward]
Balance at beginning of period			$ 12,376				$ 12,376
Net income	$ 438	$ 804	669	$ 980	$ 1,651	$ 845	1,911	$ 3,476
Other Comprehensive Income (Loss), Net of Tax	(476)	(367)	152	(179)	108	(101)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance	11,973	12,136	12,398	13,070	15,311	15,567	12,398	15,567
Distributions declared	(500)	(600)	(1,000)	(1,500)	(4,000)	(1,000)
Stockholders' Equity, Other			(83)
Balance at end of period	11,435						11,435
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance	11,435	11,973	12,136	12,371	13,070	15,311	11,435	12,371
SHAREHOLDER’S INTEREST	0						0		$ 22
Shareholder's Interest [Member]
Shareholder's Interest [Roll Forward]
Balance at beginning of period	5,166	5,166	5,227	5,227	5,227	5,227	5,227	5,227
Net income	0	0	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0	0	0
Distributions declared	0	0	0	0	0	0
Stockholders' Equity, Other			(61)
Balance at end of period	5,166	5,166	5,166	5,227	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	(905)	(538)	(690)	(471)	(579)	(478)	(690)	(478)
Net income	0	0	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	(476)	(367)	152	(179)	108	(101)
Distributions declared	0	0	0	0	0	0
Stockholders' Equity, Other			0
Balance at end of period	(1,381)	(905)	(538)	(650)	(471)	(579)	(1,381)	(650)
Retained Earnings [Member]
Shareholder's Interest [Roll Forward]
Balance at beginning of period	7,712	7,508	7,839	8,314	10,663	10,818	7,839	10,818
Net income	438	804	669	980	1,651	845
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0	0	0
Distributions declared	(500)	(600)	(1,000)	(1,500)	(4,000)	(1,000)
Stockholders' Equity, Other			0
Balance at end of period	7,650	7,712	7,508	7,794	8,314	10,663	7,650	7,794
Noncontrolling Interest
Shareholder's Interest [Roll Forward]
Net income	0	0	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0	0	0
Distributions declared	0	0	0	0	0	0
Stockholders' Equity, Other			(22)
SHAREHOLDER’S INTEREST	0	0		0	0	0	0	0	$ 22	$ 0
Parent [Member]
Shareholder's Interest [Roll Forward]
Balance at beginning of period	11,973	12,136	12,376				12,376
Net income	438	804	669	980	1,651	845
Other Comprehensive Income (Loss), Net of Tax	(476)	(367)	152	(179)	108	(101)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance				13,070	15,311	15,567		15,567
Distributions declared	(500)	(600)	(1,000)	(1,500)	(4,000)	(1,000)
Stockholders' Equity, Other			(61)
Balance at end of period	$ 11,435	$ 11,973	$ 12,136				$ 11,435
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance				$ 12,371	$ 13,070	$ 15,311		$ 12,371