CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 102	$ (129)
Other comprehensive income (loss):
Change in net unrealized gains (losses) on investments, net of income tax: 2021 - $(469); 2020 - $(392))	(1,767)	(1,477)
Reclassification adjustment for investment amounts included in net income, net of income tax: (2021 - $(7); 2020 - $3)	(27)	10
Change in net expected credit losses, net of income tax: (2021 - $1; 2020 -$(2))	5	(7)
Change in accumulated (loss) gain - derivatives, net of income tax: (2021 - $1; 2020 - $(1))	2	(5)
Reclassification adjustment for derivative amounts included in net income, net of income tax: (2021 - $—; 2020 - $—)	0	1
Total other comprehensive loss	(1,787)	(1,478)
Total comprehensive loss	$ (1,685)	$ (1,607)