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, 2021
Mar. 31, 2020
Dec. 31, 2020
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale $ 1,680   $ 1,585
Loans and leases 7,003   6,681
Other assets 17,212   15,718
Nonrecurring      
Gains (Losses)      
Loans held-for-sale 5 $ (78)  
Loans and leases (14) (27)  
Foreclosed properties (1) (6)  
Other assets (403) (2)  
Loss on loans and leases written down to zero 3 12  
Nonrecurring | Government Guaranteed Mortgage Loans upon Foreclosure Receivable      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Foreclosed properties 87 224  
Nonrecurring | Level 2      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale 2,116 1,017  
Loans and leases 0 0  
Foreclosed properties 0 0  
Other assets 49 27  
Nonrecurring | Level 3      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale 66 628 792
Loans and leases 85 117 301
Foreclosed properties 3 15  
Other assets $ 2,155 $ 24 $ 576