CREDIT FACILITIES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,350,000
Line of Credit Facility Sublimit	20,000
Swingline subfacility	60,000
Line of Credit Facility Option to Increase Borrowing Capacity	$ 150,000
Approved Debt to Capital Ratio	70.00%
Ratio of Indebtedness to Net Capital	0.502
Ratio of Indebtedness to Net Capital Excluding KGSS-I debt	48.00%
Letters of Credit Outstanding, Amount	$ 1,350
Short-Term Debt	0
Line of Credit Facility, Remaining Borrowing Capacity	1,349,000
Commercial paper maximum borrowing capacity	$ 1,350,000
CommercialPaperMaximumMaturityTerm	270 days
Short-term debt	$ 811,900	$ 914,600
Short-Term Debt, Weighted Average Interest Rate, at Point in Time	4.69%	4.77%