SHAREHOLDERS' EQUITY - Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)		$ 555		$ 564		$ 678	$ 686
Acquisition and operating expenses		(1,249)		(1,333)		(2,558)	(2,729)
Income tax (expense) or benefit		(191)		(314)		(345)	(561)
Net of tax		$ 1,634	$ 1,188	$ 1,394	$ 1,047	$ 2,822	$ 2,441
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		$ 19		$ 85		$ 64	$ 142
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)		27		114		84	192
Income tax (expense) or benefit	[1]	(6)		(24)		(18)	(40)
Net of tax		21		90		66	152
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)		(1)	(1)
Income tax (expense) or benefit	[1]	0		0		0	0
Net of tax		(1)		(1)		(1)	(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)		(5)		(1)	(11)
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		1		0	2
Net of tax		$ (1)		$ (4)		$ (1)	$ (9)

[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).