Low-Income Housing Limited Partnerships (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Total assets	$ 70,035	$ 64,079
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total assets	40	41
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$ 34	$ 35