Commitments and Contingencies - Schedule of Investment Commitments (Details) - Commitment to Invest $ in Millions	Mar. 31, 2024 USD ($)
Other Commitments [Line Items]
Unfunded investment commitment	$ 4,225
Limited partnerships
Other Commitments [Line Items]
Unfunded investment commitment	2,366
Whole loans
Other Commitments [Line Items]
Unfunded investment commitment	678
Fixed maturity securities, ABS
Other Commitments [Line Items]
Unfunded investment commitment	341
Direct Lending
Other Commitments [Line Items]
Unfunded investment commitment	530
Other fixed maturity securities, AFS
Other Commitments [Line Items]
Unfunded investment commitment	11
Commercial mortgage loans
Other Commitments [Line Items]
Unfunded investment commitment	82
Other assets
Other Commitments [Line Items]
Unfunded investment commitment	173
Other invested assets
Other Commitments [Line Items]
Unfunded investment commitment	$ 44

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant