INVESTMENTS - Components of Net Investment Income (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income		$ 4,352	$ 4,046	$ 3,882
Less investment expenses		236	235	226
Net investment income		4,116	3,811	3,656
Change in value of federal historic rehabilitation and solar tax credit investments		(165)	(343)	(91)
Federal historic rehabilitation and solar tax credits, amount		164	334	83
Fixed maturity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income		2,894	2,873	2,926
Equity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income		24	28	31
Commercial mortgage and other loans
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income		1,046	1,002	716
Other investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	[1]	130		131
Gross investment loss	[1]		(70)
Short-term investments and cash equivalents
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income		$ 258	$ 213	$ 78

[1] The change in value of federal historic rehabilitation and solar investments in partnerships of $165, $343 and $91 in 2024, 2023, and 2022, respectively, is included as a reduction to net investment income. Tax credits on these investments of $164, $334, and $83 in 2024, 2023, and 2022, respectively, have been recorded as an income tax benefit in the consolidated statement of earnings.