Accumulated Other Comprehensive Income (Loss) - Reclassifications out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Interest expense	$ 22.5	$ 28.8	$ 68.3	$ 86.7
Benefit for income taxes	(2.7)	(12.8)	(25.8)	(24.3)
Net income (loss) attributable to parent	$ 126.0	$ 29.5	269.5	(184.9)
Reclassification out of Accumulated Other Comprehensive (Loss) Income
Income Statement [Abstract]
Net income (loss) attributable to parent			2.1	15.6
Unrecognized Gains (Losses) on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive (Loss) Income
Income Statement [Abstract]
Interest expense			0.0	18.5
Benefit for income taxes			0.0	(4.6)
Net income (loss) attributable to parent			0.0	13.9
Pension and Other Postretirement Benefit Plans | Reclassification out of Accumulated Other Comprehensive (Loss) Income
Income Statement [Abstract]
Cost of sales and Selling and administrative expenses			2.8	2.3
Benefit for income taxes			(0.7)	(0.6)
Net income (loss) attributable to parent			$ 2.1	$ 1.7