FAIR VALUE - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate bonds	$ 33,060	$ 33,750
Interest rate & other derivative — non-qualifying hedges	626	660
Interest rate & other derivative — non-qualifying hedges	631	625
Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate bonds	33,060	33,750
Interest rate & other derivative — non-qualifying hedges	626	660
Interest rate & other derivative — non-qualifying hedges	631	625
Fair Value, Recurring | Corporate Bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate bonds	353	467
Fair Value, Recurring | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate bonds	138	168
Interest rate & other derivative — non-qualifying hedges	23	17
Interest rate & other derivative — non-qualifying hedges	1	1
Fair Value, Recurring | Level 3 | Corporate Bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate bonds	138	168
Fair Value, Recurring | Level 3 | Interest Rate and Other Derivative
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest rate & other derivative — non-qualifying hedges	23	17
Interest rate & other derivative — non-qualifying hedges	$ 1	$ 1