Quarterly report pursuant to Section 13 or 15(d)

AVAILABLE-FOR-SALE SECURITIES AVAILABLE-FOR-SALE SECURITIES - Gross Realized Gains (Details)

v3.10.0.1
AVAILABLE-FOR-SALE SECURITIES AVAILABLE-FOR-SALE SECURITIES - Gross Realized Gains (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]        
Gross gains on sales of securities $ 1 $ 4 $ 6 $ 5
Gross (losses) on sales of securities 1 0 6 1
Net gain on sales of securities 0 4 0 4
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net 0 (4) 0 (4)
Gain (Loss) on Sale of Investments $ 0 $ 0 $ 0 $ 0