Variable Interest Entities - Summary of Potential Losses (Details)(Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Liabilities and Stockholders' Equity	$ 109,298	$ 58,309
Liabilities for commitments to tax credit investments	99,636	53,571
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liabilities and Stockholders' Equity	762	169
Amortization method qualified affordable housing project investments, tax provision	60	22	$ 19
Affordable housing tax credits and other tax benefits, amount	77	26	23
Affordable housing tax credits, amount	60	22	$ 19
Variable Interest Entity, Not Primary Beneficiary | Investment In Qualified Affordable Housing Projects
Variable Interest Entity [Line Items]
Liabilities and Stockholders' Equity	598	157
Variable Interest Entity, Not Primary Beneficiary | Other tax credit equity investments
Variable Interest Entity [Line Items]
Liabilities and Stockholders' Equity	5	0
Variable Interest Entity, Not Primary Beneficiary | Total tax credit equity investments
Variable Interest Entity [Line Items]
Liabilities and Stockholders' Equity	603	157
Variable Interest Entity, Not Primary Beneficiary | Other unconsolidated investments
Variable Interest Entity [Line Items]
Liabilities and Stockholders' Equity	159	12
Variable Interest Entity, Not Primary Beneficiary | Commitments to tax credit investments
Variable Interest Entity [Line Items]
Liabilities for commitments to tax credit investments	$ 295	$ 43