Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Nonrecurring Fair Value (Details)

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Fair Value Measurements - Nonrecurring Fair Value (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale $ 2,547   $ 2,942
Loans and leases 6,187   4,349
Other assets 22,929   $ 19,739
Gains (Losses)      
Loans held-for-sale (1) $ (2)  
Loans and leases (40) (98)  
Foreclosed properties (13) (17)  
Other assets (11) (7)  
Nonrecurring      
Gains (Losses)      
Loss on loans and leases written down to zero 18 45  
Nonrecurring | Government Guaranteed Mortgage Loans upon Foreclosure Receivable      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Foreclosed properties 400 680  
Nonrecurring | Level 2      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale 55 13  
Loans and leases 0 0  
Foreclosed properties 0 0  
Other assets 61 47  
Nonrecurring | Level 3      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale 0 0  
Loans and leases 120 273  
Foreclosed properties 40 61  
Other assets $ 6 $ 0