FAIR VALUE MEASUREMENTS - Fair Value Measurement Inputs and Valuation Techniques (Details) $ in Millions		Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		$ 75,741	$ 98,696
Equity securities		1,091	1,603
Asset derivatives		617	936
Liability derivatives		1,698	1,619
Assets, fair value		82,924	108,012
Liabilities, fair value		1,698	1,619
Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		1,778	1,298
Equity securities		209	173
Asset derivatives		0	0
Assets, fair value		1,987	1,471
Liabilities, fair value		0	0
Adjustd cost | Level 3
Fair Value Measurement Inputs and Valuation Technique
Equity securities		209	173
Mortgage- and asset-backed securities
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		2,146	1,246
Mortgage- and asset-backed securities | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		343	291
Mortgage- and asset-backed securities | Consensus pricing valuation technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		$ 343	$ 291
Mortgage- and asset-backed securities | Lower Limit | Consensus pricing valuation technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Debt securities, available-for-sale, measurement input	[1]	97.38	104.79
Mortgage- and asset-backed securities | Upper Limit | Consensus pricing valuation technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Debt securities, available-for-sale, measurement input	[1]	106.71	111.36
Public utilities
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		$ 7,666	$ 10,051
Public utilities | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		497	493
Public utilities | Discounted cash flow technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		$ 497	$ 493
Public utilities | Lower Limit | Discounted cash flow technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Debt securities, available-for-sale, measurement input	[2]	0.0128	0.0118
Public utilities | Upper Limit | Discounted cash flow technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Debt securities, available-for-sale, measurement input	[2]	0.0286	0.0260
Sovereign and supranational
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		$ 834	$ 1,115
Sovereign and supranational | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		37	43
Sovereign and supranational | Consensus pricing valuation technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		37	43
Banks/financial institutions
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		9,299	11,591
Banks/financial institutions | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		159	45
Banks/financial institutions | Consensus pricing valuation technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities			$ 45
Banks/financial institutions | Discounted cash flow technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		$ 159
Banks/financial institutions | Lower Limit | Consensus pricing valuation technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Debt securities, available-for-sale, measurement input	[1]		100.00
Banks/financial institutions | Lower Limit | Discounted cash flow technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Debt securities, available-for-sale, measurement input	[2]	0.0067
Banks/financial institutions | Upper Limit | Consensus pricing valuation technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Debt securities, available-for-sale, measurement input	[1]		103.00
Banks/financial institutions | Upper Limit | Discounted cash flow technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Debt securities, available-for-sale, measurement input	[2]	0.0188
Other corporate
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		$ 28,362	$ 37,837
Other corporate | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		742	426
Other corporate | Discounted cash flow technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Available for sale, fixed maturity securities		$ 742	$ 426
Other corporate | Lower Limit | Discounted cash flow technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Debt securities, available-for-sale, measurement input	[2]	0.0066	0.0121
Other corporate | Upper Limit | Discounted cash flow technique | Level 3
Fair Value Measurement Inputs and Valuation Technique
Debt securities, available-for-sale, measurement input	[2]	0.0647	0.0560

[1] Represents prices for securities where the Company receives unadjusted broker quotes and for which there is no transparency into the providers' valuation techniques.

[2] Actual or equivalent credit spreads in basis points.