SHORT-TERM AND LONG-TERM DEBT - Schedule of Short-Term and Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Principal
Short-Term Debt	$ 42.1	$ 111.5
Long-Term Debt	1,754.3	1,687.9
Total Debt	1,796.4	1,799.4
Unamortized Debt Issuance Costs
Short-Term Debt	0.0	(0.1)
Long-Term Debt	(8.3)	(8.0)
Total Debt	(8.3)	(8.1)
Total
Short-Term Debt	42.1	111.4
Long-Term Debt	1,746.0	1,679.9
Total Debt	$ 1,788.1	$ 1,791.3