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
Mar. 31, 2018
Mar. 31, 2017
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance $ 614 $ 630
Carrying Value $ 519 $ 533
Pre-Modification Interest Rate 4.39% 4.77%
Post-Modification Interest Rate 4.36% 4.19%
Net Charge-offs $ 9 $ 8
Residential Mortgage    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance 407 382
Carrying Value $ 358 $ 344
Pre-Modification Interest Rate 4.39% 4.68%
Post-Modification Interest Rate 4.36% 4.44%
Net Charge-offs $ 3 $ 2
Home equity lines of credit    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance 207 248
Carrying Value $ 161 $ 189
Pre-Modification Interest Rate 4.37% 4.90%
Post-Modification Interest Rate 4.37% 3.80%
Net Charge-offs $ 6 $ 6