Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance $ 1,263 $ 1,588 $ 1,979
Carrying Value $ 999 $ 1,302 $ 1,666
Pre-Modification Interest Rate 4.38% 4.33% 4.40%
Post-Modification Interest Rate 4.03% 3.83% 3.54%
Residential Mortgage      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance $ 774 $ 824 $ 1,130
Carrying Value $ 641 $ 712 $ 1,017
Pre-Modification Interest Rate 4.33% 4.43% 4.73%
Post-Modification Interest Rate 4.21% 4.16% 4.16%
Home Equity      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance $ 489 $ 764 $ 849
Carrying Value $ 358 $ 590 $ 649
Pre-Modification Interest Rate 4.46% 4.22% 3.95%
Post-Modification Interest Rate 3.74% 3.49% 2.72%