Quarterly report pursuant to Section 13 or 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
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Unpaid Principal Balance $ 581 $ 145
Carrying Value $ 513 $ 123
Pre-Modification Interest Rate 3.49% 4.15%
Post-Modification Interest Rate 3.48% 4.06%
Residential Mortgage    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Unpaid Principal Balance $ 519 $ 122
Carrying Value $ 464 $ 103
Pre-Modification Interest Rate 3.50% 4.04%
Post-Modification Interest Rate 3.48% 3.94%
Home equity    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Unpaid Principal Balance $ 62 $ 23
Carrying Value $ 49 $ 20
Pre-Modification Interest Rate 3.43% 4.69%
Post-Modification Interest Rate 3.44% 4.68%