Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statements of Comprehensive Income (Loss)
Net income (loss)	$ (34)	$ (123)	$ (143)	$ (290)
Available-for-sale securities with no credit losses:
Unrealized gains (losses) arising during the period	(102)	(10)	(399)	(42)
Reclassification adjustments for (gains) losses included in net income (loss)	(3)	(3)	(5)	(11)
Available-for-sale securities with credit losses:
Unrealized gains (losses) arising during the period	1	0	0	0
Foreign currency translation:
Foreign currency translation gains (losses)	0	0	1	3
Instrument-specific credit risk of liabilities measured at fair value:
Unrealized gains (losses) arising during the period	(2)	(12)	(22)	(11)
Reclassification adjustments for (gains) losses included in net income (loss)	23	12	11	36
Net period other comprehensive income (loss)	(83)	(13)	(414)	(25)
Total comprehensive income (loss)	$ (117)	$ (136)	$ (557)	$ (315)