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 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance $ 687 $ 1,757 $ 1,314 $ 3,339
Carrying Value $ 605 $ 1,579 $ 1,146 $ 2,926
Pre-Modification Interest Rate 4.36% 4.60% 4.34% 4.76%
Post-Modification Interest Rate 4.00% 4.44% 3.98% 4.42%
Net Charge-offs $ 19 $ 44 $ 31 $ 72
Residential Mortgage        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance 437 1,409 854 2,760
Carrying Value $ 405 $ 1,294 $ 785 $ 2,479
Pre-Modification Interest Rate 4.68% 4.87% 4.72% 4.98%
Post-Modification Interest Rate 4.42% 4.71% 4.45% 4.64%
Net Charge-offs $ 3 $ 25 $ 5 $ 42
Principal forgiveness 1 102 11 261
Home equity        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance 250 348 460 579
Carrying Value $ 200 $ 285 $ 361 $ 447
Pre-Modification Interest Rate 3.81% 3.49% 3.63% 3.72%
Post-Modification Interest Rate 3.27% 3.36% 3.10% 3.36%
Net Charge-offs $ 16 $ 19 $ 26 $ 30