Variable Interest Entities and Asset Securitizations - Summary of Carrying Amount (Details) - Variable Interest Entity Primary Beneficiary - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Affordable Housing Projects
Variable Interest Entity [Line Items]
Investment in partnership carrying amount	$ 1,332	$ 1,340
Unfunded commitments includes carrrying amount of its investments	390	410
Contingent commitments to provide additional capital contributions to partnerships	58	55
Renewable Energy
Variable Interest Entity [Line Items]
Investment in partnership carrying amount	70	80
Unfunded commitments includes carrrying amount of its investments	6	31
Other Projects
Variable Interest Entity [Line Items]
Investment in partnership carrying amount	39	41
Unfunded commitments includes carrrying amount of its investments	$ 0	$ 0