Managed Investment Entities - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) collateralizedloanobligation	Dec. 31, 2020 USD ($) collateralizedloanobligation
Variable Interest Entity [Line Items]
Percentage of investment of most subordinate debt tranche, Minimum	4.50%
Percentage of investment of most subordinate debt tranche, Maximum	46.80%
Number of collateralized loan obligation entities | collateralizedloanobligation	13
Number of collateralized loan obligation entities formed during the period | collateralizedloanobligation		1
Difference between aggregate unpaid principal balance and fair value of CLOs' fixed maturity investments	$ 72	$ 150
Difference between aggregate unpaid principal balance and fair value of CLOs' debt	187	141
Carrying amount of CLO loans in default	9	11
Aggregate unpaid principal balance of CLO loans in default	18	28
Available for sale (AFS) fixed maturities	10,357	9,084
New collateralized loan obligation entities
Variable Interest Entity [Line Items]
Face value of liabilities issued by managed investment entities on issuance date	408	303
Face amount of managed investment entities liabilities purchased by subsidiaries at issuance date	14	16
Variable interest entity, primary beneficiary
Variable Interest Entity [Line Items]
Aggregate fair value of investment in collateralized loan obligations	76
Subordinated debt obligations | Variable interest entity, primary beneficiary
Variable Interest Entity [Line Items]
Aggregate fair value of investment in collateralized loan obligations	56
Collateralized loan obligations
Variable Interest Entity [Line Items]
Available for sale (AFS) fixed maturities	1,643	1,062
Collateralized loan obligations | Managed by third parties
Variable Interest Entity [Line Items]
Available for sale (AFS) fixed maturities	$ 1,640	$ 1,060