Income Tax (Net Deferred Income Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred income tax assets:
Net operating loss carryforwards	$ 1,253	$ 1,485
Tax credit carryforwards	150	133
Employee benefits	4	4
Intangibles	45	62
Other	5	0
Total deferred income tax assets	1,457	1,684
Less: Valuation allowance	18	0
Total net deferred income tax assets	1,439	1,684
Deferred income tax liabilities:
Net unrealized investment gains	1,039	1,443
Policyholder liabilities and receivables	429	894
DAC	688	604
Investments, including derivatives	264	200
Other	0	4
Total deferred income tax liabilities	2,420	3,145
Deferred tax assets and liabilities [Abstract]
Net deferred income tax asset (liability)	$ (981)	$ (1,461)