Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 884	$ 293	$ 599	$ 1,721
Other comprehensive income (loss), before tax
Unrealized investment gains (losses) on available-for-sale securities, net of offsets	1,043	735	710	3,473
Unrealized gains (losses) on hedging instruments	(178)	124	140	171
Foreign currency translation and other adjustments	10	(1)	9	(2)
Other Comprehensive Income (Loss), before Tax, Total	875	858	859	3,642
Income tax expense (benefit)	157	176	165	728
Other Comprehensive Income (Loss), Net of Tax, Total	718	682	694	2,914
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total	1,602	975	1,293	4,635
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	246	0	232	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 1,356	$ 975	$ 1,061	$ 4,635