Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Nonrecurring Fair Value (Details)

v3.10.0.1
Fair Value Measurements - Nonrecurring Fair Value (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Loans held-for-sale $ 3,116   $ 3,116   $ 2,156
Loans and leases 5,731   5,731   5,710
Other assets 23,738   23,738   $ 22,581
Nonrecurring          
Gains (Losses)          
Loans held-for-sale (2) $ 0 (2) $ (4)  
Loans and leases (63) (152) (194) (307)  
Foreclosed properties (8) (21) (22) (35)  
Other assets (22) (1) (58) (121)  
Loss on loans and leases written down to zero 24 71 76 132  
Nonrecurring | Government Guaranteed Mortgage Loans upon Foreclosure Receivable          
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Foreclosed properties 500 879 500 879  
Nonrecurring | Level 2          
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Loans held-for-sale 45 70 45 70  
Loans and leases 0 0 0 0  
Foreclosed properties 0 0 0 0  
Other assets 294 353 294 353  
Nonrecurring | Level 3          
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Loans held-for-sale 12 16 12 16  
Loans and leases 492 813 492 813  
Foreclosed properties 87 79 87 79  
Other assets $ 3 $ 0 $ 3 $ 0