Variable Interest Entities - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Assets	$ 214,658	$ 109,298
Liabilities	195,442	99,636
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	1,833	762
Assets, purchase accounting adjustments	(273)
Variable Interest Entity, Not Primary Beneficiary | Investment in qualified affordable housing projects
Variable Interest Entity [Line Items]
Assets	1,662	598
Variable Interest Entity, Not Primary Beneficiary | Other tax credit equity investments
Variable Interest Entity [Line Items]
Assets	5	5
Variable Interest Entity, Not Primary Beneficiary | Total tax credit equity investments
Variable Interest Entity [Line Items]
Assets	1,667	603
Variable Interest Entity, Not Primary Beneficiary | Other unconsolidated investments
Variable Interest Entity [Line Items]
Assets	166	159
Variable Interest Entity, Not Primary Beneficiary | Commitments to tax credit investments
Variable Interest Entity [Line Items]
Liabilities	991	$ 295
Liabilities for commitments to tax credit investments, purchase accounting adjustments	$ 70