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 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Loans held-for-sale $ 2,207   $ 2,207   $ 1,585
Loans and leases 6,950   6,950   6,681
Other assets 14,928   14,928   15,718
Nonrecurring          
Gains (Losses)          
Loans held-for-sale 9 $ (37) 9 $ (113)  
Loans and leases (24) (22) (37) (45)  
Foreclosed properties 0 (5) (1) (8)  
Other assets (67) (26) (470) (27)  
Loss on loans and leases written down to zero 15 9 18 18  
Nonrecurring | Government Guaranteed Mortgage Loans upon Foreclosure Receivable          
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Foreclosed properties 66 124 66 124  
Nonrecurring | Level 2          
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Loans held-for-sale 1,105 505 1,105 505  
Loans and leases 0 0 0 0  
Foreclosed properties 0 0 0 0  
Other assets 322 187 322 187  
Nonrecurring | Level 3          
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Loans held-for-sale 52 1,119 52 1,119 792
Loans and leases 142 186 142 186 301
Foreclosed properties 3 16 3 16  
Other assets $ 2,172 $ 6 $ 2,172 $ 6 $ 576