OTHER ASSETS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Other Assets [Abstract]
Supply contracts	$ 1,060.6	$ 1,013.8	$ 1,060.6	$ 1,013.8	$ 1,048.0
Other	56.7	76.9	56.7	76.9	54.5
Other assets	1,117.3	1,090.7	1,117.3	1,090.7	$ 1,102.5
Amortization of Supply Contracts	$ 17.8	$ 17.6	$ 53.4	$ 52.8