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Other Comprehensive Income (Loss) - Changes in Components of Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	$ 29.8	$ (0.9)
Tax	0.9	(2.9)
Other comprehensive income (loss)	30.7	(3.8)
Net gain (loss) on pension and OPEB liability adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	1.3	1.1
Tax	(2.0)	0.6
Other comprehensive income (loss)	(0.7)	1.7
Unrealized gain (loss) on derivative instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	22.4	4.5
Tax	0.3	(0.1)
Other comprehensive income (loss)	22.7	4.4
Unrealized gain (loss) on foreign currency translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	6.1	(6.5)
Tax	2.6	(3.4)
Other comprehensive income (loss)	$ 8.7	$ (9.9)

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