LONG-TERM OBLIGATIONS - Schedule of Letters of Credit Outstanding (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Letters of credit outstanding, amount	$ 114.3	$ 107.8
$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	68.0	62.8
Bilateral Arrangements
Debt Instrument [Line Items]
Letters of credit outstanding, amount	$ 46.3	$ 45.0