CREDIT FACILITIES (Details) $ in Thousands	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000,000
Line of Credit Facility Sublimit	20,000
Bridge Loan	60,000
Line of Credit Facility Option to Increase Borrowing Capacity	$ 500,000
Ratio of Indebtedness to Net Capital	0.63
Letters of Credit Outstanding, Amount	$ 1,200
Line of Credit Facility, Remaining Borrowing Capacity	998,800
Commercial paper maximum borrowing capacity	1,000,000
Commercial Paper	$ 505,165	$ 494,000
Approved Debt to Capital Ratio After December 31, 2021	0.70
Maximum borrowing capacity under the commercial paper program prior to June 2021	$ 700,000