Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT SECURITIES AND OTHER SECURITIES - Narrative (Details)

v3.19.3
INVESTMENT SECURITIES AND OTHER SECURITIES - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]          
Pledged Financial Instruments, Not Separately Reported, Securities for Other Debt Facilities $ 3,800   $ 3,800   $ 4,500
Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings $ 1 $ 0 1 $ 0  
Other-than-temporary Impairment Loss, Equity Securities, Portion Recognized in Earnings     $ 0