Variable Interest Entities and Asset Securitizations - Summary of Carrying Amount (Details) - Variable Interest Entity Primary Beneficiary - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Affordable Housing Projects
Variable Interest Entity [Line Items]
Investment in partnership carrying amount	$ 1,398	$ 1,384
Unfunded commitments includes carrying amount of its investments	476	467
Contingent commitments to provide additional capital contributions to partnerships	72	69
Renewable Energy
Variable Interest Entity [Line Items]
Investment in partnership carrying amount	92	135
Unfunded commitments includes carrying amount of its investments	66	46
Other Projects
Variable Interest Entity [Line Items]
Investment in partnership carrying amount	36	37
Unfunded commitments includes carrying amount of its investments	$ 0	$ 0