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Change in Net Unrealized Gains (Losses) on Available-for-Sale Securities Reported in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investments [Abstract]
Beginning balance		$ (2,615)	$ (2,500)	$ (2,130)	$ (3,407)
Unrealized gains (losses) on fixed maturity securities		(575)	(755)	(1,229)	415
Adjustments to policyholder contract balances	[1]	13	13	27	(6)
Provision for income taxes		120	158	257	(87)
Change in unrealized gains (losses) on investment securities		(442)	(584)	(945)	322
Reclassification adjustments to net investment (gains) losses, net of taxes of $(4), $(7), $(9) and $(10)		15	23	32	36
Change in net unrealized investment gains (losses)		(427)	(561)	(913)	358
Less: change in net unrealized investment gains (losses) attributable to noncontrolling interests		0	(5)	(1)	7
Ending balance		$ (3,042)	$ (3,056)	$ (3,042)	$ (3,056)
[1] See note 10 for additional information.

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Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Includes amounts related to other than temporary impairment (OTTI) loss.

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Other comprehensive income unrealized holding gain loss on policyholder contract balances arising during period before tax.

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