Condensed Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Investments with no other-than-temporary impairment, tax provision (benefit)	$ (29)	$ 23
Investments with other-than-temporary impairment, tax provision (benefit)	(3)	28
Reclassification adjustment for gains (losses) included in net income (loss), tax provision (benefit)	(2)	21
Net unrealized gains (losses) on FG VIE liabilities with recourse attributable to instrument-specific credit risk arising during the period, , net of tax provision (benefit)	(1)	0
Less: reclassification adjustment for gains (losses) included in net income (loss), net of tax provision (benefit)	$ (1)	$ 0