STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 139.5	$ 196.8	$ 148.1
Unrealized (losses) gains on derivative contracts
(Losses) gains arising during the period	(5.2)	(0.9)	18.7
Tax effect	1.3	0.2	(4.6)
Reclassification adjustment	(4.6)	27.9	12.4
Tax effect	1.1	(6.9)	(3.1)
Net other comprehensive (loss) income	(7.4)	20.3	23.4
TOTAL COMPREHENSIVE INCOME	$ 132.1	$ 217.1	$ 171.5