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 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Loans held-for-sale $ 3,141   $ 3,141   $ 2,059
Loans and leases 4,172   4,172   3,569
Other assets 17,254   17,254   $ 11,861
Nonrecurring          
Gains (Losses)          
Loans held-for-sale (62) $ (28) (160) $ (95)  
Loans and leases (10) (15) (26) (36)  
Foreclosed properties (17) 1 (15) (2)  
Other assets 0 (182) (40) (189)  
Loss on loans and leases written down to zero 3 4 7 8  
Nonrecurring | Government Guaranteed Mortgage Loans upon Foreclosure Receivable          
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Foreclosed properties 19 33 19 33  
Nonrecurring | Level 2          
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Loans held-for-sale 795 276 795 276  
Loans and leases 0 0 0 0  
Foreclosed properties 0 0 0 0  
Other assets 1 31 1 31  
Nonrecurring | Level 3          
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis          
Loans held-for-sale 2,685 3,066 2,685 3,066  
Loans and leases 89 129 89 129  
Foreclosed properties 149 44 149 44  
Other assets $ 274 $ 905 $ 274 $ 905