Income Tax (Net Deferred Income Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Jan. 01, 2021
Deferred tax assets and liabilities
Tax Credit Carryforward, Amount	$ 82	$ 590
Deferred income tax assets:
Policyholder liabilities and receivables	3,476	758
Net operating loss carryforwards (1)	256	238
Employee benefits	523	475
Capital loss carryforwards	29	15
Tax credit carryforwards (2)	82	590
Net unrealized investment losses	4,308	5,946
Litigation-related and government mandated	101	90
Other	393	67
Total gross deferred income tax assets	9,168	8,179
Less: Valuation allowance (1)	496	291
Total net deferred income tax assets	8,672	7,888
Deferred income tax liabilities:
Investments, including derivatives	2,054	1,691
Intangibles	1,004	1,096
DAC	3,929	3,612
Total deferred income tax liabilities	6,987	6,399
Deferred Tax Assets, Net, Total	1,685	1,489
Deferred Tax Assets, Net [Abstract]
Deferred income tax liability	927	$ 950	$ 4,723
Certain State and Foreign Net Operating Loss Carryforwards
Deferred tax assets and liabilities
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	256
Enactment of Bermuda Corporate Income Tax
Deferred tax assets and liabilities
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 198