Annual report pursuant to Section 13 and 15(d)

Outstanding Loans and Leases and Allowance for Credit Losses - Consumer Real Estate - TDRs Entered into During the Period (Details)

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Outstanding Loans and Leases and Allowance for Credit Losses - Consumer Real Estate - TDRs Entered into During the Period (Details) - Consumer real estate - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Unpaid Principal Balance $ 998 $ 819 $ 605
Carrying Value $ 865 $ 715 $ 478
Pre-Modification Interest Rate 3.49% 3.66% 4.39%
Post-Modification Interest Rate 3.41% 3.59% 4.17%
Residential Mortgage      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Unpaid Principal Balance $ 891 $ 732 $ 464
Carrying Value $ 788 $ 646 $ 377
Pre-Modification Interest Rate 3.48% 3.66% 4.19%
Post-Modification Interest Rate 3.38% 3.59% 4.13%
Home equity      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Unpaid Principal Balance $ 107 $ 87 $ 141
Carrying Value $ 77 $ 69 $ 101
Pre-Modification Interest Rate 3.60% 3.67% 5.04%
Post-Modification Interest Rate 3.59% 3.61% 4.31%