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LONG-TERM OBLIGATIONS - Schedule of Letters of Credit Outstanding (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Debt Instrument [Line Items]    
Letters of credit outstanding, amount $ 118.7 $ 118.4
$400 Million Facility    
Debt Instrument [Line Items]    
Letters of credit outstanding, amount 0.0 0.0
$300 Million Facility    
Debt Instrument [Line Items]    
Letters of credit outstanding, amount 69.6 70.4
Bilateral Arrangements    
Debt Instrument [Line Items]    
Letters of credit outstanding, amount $ 49.1 $ 48.0