Shareholders' Equity - OCI Components (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pretax
Total other comprehensive income (loss)	$ (1,153)	$ (404)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	255	92
Net of Tax
Arising during the period	(882)	(273)
Reclassification to net income	(16)	(39)
Total other comprehensive income (loss), net of tax	(898)	(312)
Net unrealized gains (losses) on securities
Pretax
Total other comprehensive income (loss)	(1,096)	(440)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	243	100
Net of Tax
Arising during the period	(837)	(301)
Reclassification to net income	(16)	(39)
Total other comprehensive income (loss), net of tax	(853)	(340)
Net unrealized gains (losses) on securities, excluding insurance related impact
Pretax
Arising during the period	(1,592)	(690)
Income Tax Benefit (Expense)
Arising during the period	347	152
Net of Tax
Arising during the period	(1,245)	(538)
Net unrealized gains (losses) on securities
Pretax
Reclassification to net income	(20)	(50)
Income Tax Benefit (Expense)
Reclassification to net income	4	11
Net of Tax
Reclassification to net income	(16)	(39)
Impact of DAC, DSIC, unearned revenue, benefit reserves and reinsurance recoverables
Pretax
Arising during the period	516	300
Income Tax Benefit (Expense)
Arising during the period	(108)	(63)
Net of Tax
Arising during the period	408	237
Net unrealized gains (losses) on derivatives
Pretax
Arising during the period	1	0
Total other comprehensive income (loss)	1	0
Income Tax Benefit (Expense)
Arising during the period	0	0
Total other comprehensive income (loss)	0	0
Net of Tax
Arising during the period	1	0
Reclassification to net income	0	0
Total other comprehensive income (loss), net of tax	1	0
Defined benefit plans
Pretax
Arising during the period	0	37
Total other comprehensive income (loss)	0	37
Income Tax Benefit (Expense)
Arising during the period	0	(8)
Total other comprehensive income (loss)	0	(8)
Net of Tax
Arising during the period	0	29
Reclassification to net income	0	0
Total other comprehensive income (loss), net of tax	0	29
Foreign currency translation
Pretax
Total other comprehensive income (loss)	(58)	(1)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	12	0
Net of Tax
Arising during the period	(46)	(1)
Reclassification to net income	0	0
Total other comprehensive income (loss), net of tax	$ (46)	$ (1)