Schedule II (Condensed Statements Of Operations) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Income Statements, Captions [Line Items]
Net gains (losses) on financial instruments at fair value and foreign exchange	$ 40	$ (86)	$ (78)
Investment losses related to other-than-temporary impairments:
Net gains (losses) on extinguishment of debt	30		(1)
Other net realized gains (losses)	(6)	0	4
Total revenues	189	282	280
Interest	163	178	201
Provision (benefit) for income taxes	0	0	2
Net income (loss)	(445)	(578)	(359)
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Net investment income	26	28	35
Net gains (losses) on financial instruments at fair value and foreign exchange	52	(67)	(57)
Investment losses related to other-than-temporary impairments:
Net gains (losses) on extinguishment of debt	30	0	(1)
Other net realized gains (losses)	(6)	0	(2)
Total revenues	102	(39)	(25)
Operating	10	10	10
Interest	75	83	90
Total expenses	85	93	100
Gain (loss) before income taxes and equity in earnings of subsidiaries	17	(132)	(125)
Provision (benefit) for income taxes	(3)	(4)	(99)
Gain (loss) before equity in earnings of subsidiaries	20	(128)	(26)
Equity in net income (loss) of subsidiaries	(465)	(450)	(333)
Net income (loss)	$ (445)	$ (578)	$ (359)