Variable Interest Entities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Total assets	$ 107,673	$ 58,309
Total liabilities	97,031	53,571
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total assets	708	169
Total liabilities	243	43
Maximum loss exposure	708	169
Variable Interest Entity, Not Primary Beneficiary | Tax credit equity investments
Variable Interest Entity [Line Items]
Total assets	544	157
Variable Interest Entity, Not Primary Beneficiary | Equity investments
Variable Interest Entity [Line Items]
Total assets	164	12
Variable Interest Entity, Not Primary Beneficiary | Commitments to tax credit investments
Variable Interest Entity [Line Items]
Total liabilities	$ 243	$ 43