Other Assets (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Assets [Line Items]
Accumulated goodwill impairment losses	$ 221	$ 221
Gross carrying amount	720	733
Accumulated amortization	574	532
Amortization expense	51	57	$ 54
Expected amortization expense in 2023	49
Expected amortization expense in 2024	44
Expected amortization expense in 2025	20
Expected amortization expense in 2026	10
Expected amortization expense in 2027	9
Expected amortization expense after 2027	14
Tax credit investments	1,207	1,124
Tax credit investments - Affordable Housing partnerships	$ 1,146	1,084
Minimum
Other Assets [Line Items]
Estimated useful lives	1 year
Maximum
Other Assets [Line Items]
Estimated useful lives	22 years
Other Expense
Other Assets [Line Items]
QAH investment losses	$ 161	226
Equity method losses related to QAH investments			128
Income Tax Provision
Other Assets [Line Items]
QAH Tax Credits for equity method losses	141	135	$ 129
Other Liabilities
Other Assets [Line Items]
QAH unfunded commitment	348
Variable Interest Entity, Primary Beneficiary
Other Assets [Line Items]
Tax credit investments - Affordable Housing partnerships	980	$ 994
Variable Interest Entity, Primary Beneficiary | Off-Balance Sheet Obligations
Other Assets [Line Items]
Affordable Housing Program off balance sheet obligation	13
Variable Interest Entity, Primary Beneficiary | Other Liabilities
Other Assets [Line Items]
QAH unfunded commitment	$ 222
Earliest Year | Other Liabilities
Other Assets [Line Items]
Affordable housing tax credits commitment, year to be paid	2023
Latest Year | Other Liabilities
Other Assets [Line Items]
Affordable housing tax credits commitment, year to be paid	2040