DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of Adjustments to the Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Asset Fair Value
Gross derivatives fair values presented in the Consolidated Balance Sheets	$ 570	$ 660
Amounts subject to master netting agreements	(116)	(48)
Cash collateral pledged (received) subject to master netting agreements	(218)	(539)
Total net derivative fair value	236	73
Liability Fair Value
Liability Fair Value	(520)	(625)
Amounts subject to master netting agreements	116	48
Cash collateral pledged (received) subject to master netting agreements	75	2
Total net derivative fair value	(329)	(575)
Qualifying Hedges
Asset Fair Value
Gross fair value	18	15
Cleared trades, variation margin netting	(18)	(14)
Total derivative asset	0	1
Gross derivatives fair values presented in the Consolidated Balance Sheets	0	1
Liability Fair Value
Gross fair value	0	0
Cleared trades, variation margin netting	0	0
Total derivative liability	0	0
Liability Fair Value	0	0
Non-qualifying Hedges
Asset Fair Value
Gross fair value	625	742
Cleared trades, variation margin netting	(55)	(83)
Total derivative asset	570	659
Gross derivatives fair values presented in the Consolidated Balance Sheets	570	659
Liability Fair Value
Gross fair value	(563)	(647)
Cleared trades, variation margin netting	43	22
Total derivative liability	(520)	(625)
Liability Fair Value	$ (520)	$ (625)