Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Interest expense	$ 87.7	$ 111.1	$ 88.4
Benefit for income taxes	21.8	(11.4)	(12.9)
Net income (loss) attributable to parent	562.5	(33.3)	159.1
Reclassification out of Accumulated Other Comprehensive (Loss) Income
Income Statement [Abstract]
Net income (loss) attributable to parent	3.5	16.2	13.6
Unrealized Gains (Losses) on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive (Loss) Income
Income Statement [Abstract]
Interest expense	0.0	18.5	15.6
Benefit for income taxes	0.0	(4.6)	(3.7)
Net income (loss) attributable to parent	0.0	13.9	11.9
Pension and Postretirement Benefit Plans | Reclassification out of Accumulated Other Comprehensive (Loss) Income
Income Statement [Abstract]
Net periodic benefit cost	4.7	3.0	2.2
Benefit for income taxes	(1.2)	(0.7)	(0.5)
Net income (loss) attributable to parent	$ 3.5	$ 2.3	$ 1.7