XML 111 R77.htm IDEA: XBRL DOCUMENT v3.20.2
Fair Value Changes in FV under the FV Option (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Loans [Member]        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair value (gains) losses, net $ (107) $ (95) $ (248) $ (334)
Long-term debt [Member]        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair value (gains) losses, net $ 32 $ 245 $ 344 $ 797