Low-Income Housing Limited Partnerships (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Total assets	$ 61,188	$ 57,851
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total assets	44	45
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$ 35	$ 35