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, 2020
Mar. 31, 2019
Dec. 31, 2019
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale $ 3,609   $ 3,709
Loans and leases 9,016   8,335
Other assets 6,789   15,518
Nonrecurring      
Gains (Losses)      
Loans held-for-sale (78) $ (1)  
Loans and leases (27) (40)  
Foreclosed properties (6) (13)  
Other assets (2) (11)  
Loss on loans and leases written down to zero 12 18  
Nonrecurring | Government Guaranteed Mortgage Loans upon Foreclosure Receivable      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Foreclosed properties 224 400  
Nonrecurring | Level 2      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale 1,017 55  
Loans and leases 0 0  
Foreclosed properties 0 0  
Other assets 27 61  
Nonrecurring | Level 3      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale 628 0 102
Loans and leases 117 120 257
Foreclosed properties 15 40  
Other assets $ 24 $ 6 $ 640