Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statements of Comprehensive Income (Loss)
Net income (loss)	$ (73)	$ (106)
Available-for-sale securities with no credit losses:
Unrealized gains (losses) arising during the period	(171)	(87)
Reclassification adjustments for (gains) losses included in net income (loss)	0	(5)
Foreign currency translation:
Foreign currency translation gains (losses)	0	1
Instrument-specific credit risk of liabilities measured at fair value:
Unrealized gains (losses) arising during the period	(14)	(5)
Reclassification adjustments for (gains) losses included in net income (loss)	3	20
Net period other comprehensive income (loss)	(182)	(76)
Comprehensive income (loss)	$ (255)	$ (182)