FAIR VALUE - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Fair Value, Recurring - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Other Derivative Liabilities — Non-Qualifying
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 1	$ 1
Purchases	0	0
Changes in fair value included in earnings	0	0
Changes in fair value included in comprehensive income	0	0
Maturity and settlements	0	0
Ending balance	1	1
Corporate Bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	168	157
Purchases	0	0
Changes in fair value included in earnings	0	(1)
Changes in fair value included in comprehensive income	9	8
Maturity and settlements	(68)	0
Ending balance	109	164
Other Derivative Assets — Non-Qualifying
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	17	7
Purchases	6	7
Changes in fair value included in earnings	4	1
Changes in fair value included in comprehensive income	0	0
Maturity and settlements	(2)	0
Ending balance	$ 25	$ 15