Quarterly report pursuant to Section 13 or 15(d)

Fair Value Option - Gains (Losses) Related to Borrower-specific Credit Risk for Assets Accounted for Under the Fair Value Option (Details)

v3.20.2
Fair Value Option - Gains (Losses) Related to Borrower-specific Credit Risk for Assets Accounted for Under the Fair Value Option (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Loans reported as trading account assets        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option $ 11 $ 19 $ (225) $ 47
Consumer and commercial loans        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option 100 (5) (96) 14
Loans held-for-sale        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option (24) 29 (117) 70
Unfunded loan commitments        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option $ (18) $ 13 $ (88) $ 54