SHAREHOLDERS' EQUITY - Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)		$ (572)	$ 1,271	$ 590
Net investment income		4,076	4,116	3,811
Earnings before income taxes		4,533	6,417	5,262
Acquisition and operating expenses		(5,338)	(5,060)	(5,228)
Income tax (expense) benefit		(887)	(974)	(603)
Net of tax		$ 3,646	$ 5,443	$ 4,659
U.S. federal statutory income tax rate		21.00%	21.00%	21.00%
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax		$ 1	$ 153	$ 127
Reclassification out of Accumulated Other Comprehensive Income | Unrealized gains (losses) on available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)		6	197	166
Income tax (expense) benefit	[1]	(1)	(41)	(35)
Net of tax		5	156	131
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)		(4)	(5)	(4)
Net investment income		(1)	(1)	(1)
Earnings before income taxes		(5)	(6)	(5)
Income tax (expense) benefit	[1]	1	1	1
Net of tax		(4)	(5)	(4)
Reclassification out of Accumulated Other Comprehensive Income | Pension liability adjustment, actuarial gains (losses)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Acquisition and operating expenses	[2]	0	1	0
Reclassification out of Accumulated Other Comprehensive Income | Pension liability adjustment, prior service (cost) credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Acquisition and operating expenses	[2]	0	1	0
Reclassification out of Accumulated Other Comprehensive Income | Pension Liability Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	[1]	0	0	0
Net of tax		$ 0	$ 2	$ 0

[1] Based on 21% tax rate

[2] These accumulated other comprehensive income components are included in the computation of net periodic benefit cost (see Note 13 for additional details).