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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Unpaid Principal Balance $ 142 $ 255 $ 264 $ 436
Carrying Value $ 121 $ 196 $ 223 $ 337
Pre-Modification Interest Rate 4.14% 4.63% 4.08% 4.61%
Post-Modification Interest Rate 4.11% 4.69% 3.99% 4.51%
Residential Mortgage        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Unpaid Principal Balance $ 120 $ 154 $ 219 $ 277
Carrying Value $ 103 $ 125 $ 185 $ 224
Pre-Modification Interest Rate 4.22% 4.28% 4.10% 4.27%
Post-Modification Interest Rate 4.19% 4.39% 4.01% 4.30%
Home Equity        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Unpaid Principal Balance $ 22 $ 101 $ 45 $ 159
Carrying Value $ 18 $ 71 $ 38 $ 113
Pre-Modification Interest Rate 3.68% 5.17% 3.99% 5.21%
Post-Modification Interest Rate 3.65% 5.16% 3.92% 4.88%