OTHER ASSETS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Other Assets [Abstract]
Supply contracts	$ 1,065.1	$ 1,045.4	$ 1,061.8
Other	58.4	59.3	56.7
Other assets	1,123.5	1,104.7	$ 1,118.5
Payments under other long-term supply contracts	28.5	9.3
Amortization of Supply Contracts	$ 18.3	$ 17.6