Quarterly report pursuant to Section 13 or 15(d)

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

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Outstanding Loans and Leases - Consumer Real Estate - TDRs Entered into During the Period (Details) - Consumer real estate - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance $ 346 $ 506 $ 1,229 $ 1,368
Carrying Value $ 285 $ 435 $ 991 $ 1,148
Pre-Modification Interest Rate 4.41% 4.25% 4.30% 4.33%
Post-Modification Interest Rate 4.29% 4.17% 3.94% 3.90%
Net charge-offs $ 9 $ 17 $ 33 $ 37
Residential Mortgage        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance 226 294 747 738
Carrying Value $ 195 $ 263 $ 635 $ 657
Pre-Modification Interest Rate 4.27% 4.42% 4.22% 4.49%
Post-Modification Interest Rate 4.12% 4.33% 4.03% 4.25%
Home Equity        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance $ 120 $ 212 $ 482 $ 630
Carrying Value $ 90 $ 172 $ 356 $ 491
Pre-Modification Interest Rate 4.67% 4.01% 4.42% 4.16%
Post-Modification Interest Rate 4.60% 3.96% 3.78% 3.52%