Accumulated Other Comprehensive Income (Details Of The Reclassification From AOCI) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income (loss) from continuing operations before income taxes	$ (484)	$ (148)	$ (445)
Net gains (losses) on financial instruments at fair value and foreign exchange	4	45	40
Net income (loss)	(491)	(195)	(445)
Amounts reclassified from AOCI [Member]
Net income (loss)	(112)	(8)	(24)
Unrealized gains (losses) on AFS, net [Member] | Amounts reclassified from AOCI [Member]
Net realized investment gains (losses)	(67)	10	12
Income (loss) from continuing operations before income taxes	(67)	10	12
Net income (loss)	(67)	10	12
Instrument-specific credit risk of liabilities measured at fair value, net [Member] | Amounts reclassified from AOCI [Member]
Other net realized gains (losses)	(20)	0	(16)
Net gains (losses) on financial instruments at fair value and foreign exchange	$ (25)	$ (18)	$ (20)