SHAREHOLDERS' EQUITY - Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended						9 Months Ended
		Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)		$ 199			$ (171)			$ 885	$ 224
Acquisition and operating expenses		(1,377)			(1,515)			(4,287)	(4,584)
Income tax (expense) or benefit		493			(225)			(64)	(804)
Net of tax		$ 1,596	$ 1,388	$ 1,032	$ 888	$ 1,105	$ 1,293	$ 4,016	$ 3,286
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			$ 2			$ 183	$ (26)
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)		58			13			252	(2)
Income tax (expense) or benefit	[1]	(12)			(3)			(53)	0
Net of tax		46			10			199	(2)
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)			(2)			(3)	(4)
Income tax (expense) or benefit	[1]	0			0			1	1
Net of tax		(1)			(2)			(2)	(3)
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]	(7)			(8)			(18)	(27)
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]	1			2			4	6
Net of tax		$ (6)			$ (6)			$ (14)	$ (21)

[1] Based on 21% tax rate

[2] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 12 for additional details).