SHAREHOLDERS' EQUITY - Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)		$ 696		$ 555		$ 1,647	$ 678
Acquisition and operating expenses		(1,198)		(1,249)		(2,453)	(2,558)
Income tax (expense) or benefit		(264)		(191)		(556)	(345)
Net of tax		$ 1,755	$ 1,879	$ 1,634	$ 1,188	$ 3,634	$ 2,822
U.S. federal statutory income tax rate		21.00%		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		$ 39		$ 19		$ 171	$ 64
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)		50		27		218	84
Income tax (expense) or benefit	[1]	(11)		(6)		(46)	(18)
Net of tax		39		21		172	66
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)		(1)		(1)		(2)	(1)
Income tax (expense) or benefit	[1]	0		0		0	0
Net of tax		(1)		(1)		(2)	(1)
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]	1		(1)		1	(1)
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		0		0	0
Reclassification Out Of Accumulated Other Comprehensive Income | Pension Liability Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) or benefit	[1]	0		0		0	0
Net of tax		$ 1		$ (1)		$ 1	$ (1)

[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 12 for additional details).