Commitments and Contingencies - Funding Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Commitments
Funding commitments	$ 1,908	$ 1,475
Commercial mortgage loans
Commitments
Funding commitments	17	1
Property funds
Commitments
Funding commitments	27	26
Pledged asset lines of credit
Commitments
Funding commitments	$ 1,864	$ 1,448

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