Financial Instruments - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	$ 2,537.7	$ 2,642.8	$ 2,597.4
Other comprehensive (loss) income before reclassifications	(6.3)	23.8
Amounts reclassified from accumulated other comprehensive income (loss)	(1.9)	3.3
Other comprehensive (loss) income	(8.2)	27.1	(2.0)
Balance at the end of the period	2,629.5	2,537.7	2,642.8
Accrued post-retirement benefit liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(40.5)	(40.5)
Other comprehensive (loss) income before reclassifications	(0.6)	(5.3)
Amounts reclassified from accumulated other comprehensive income (loss)	4.7	5.3
Other comprehensive (loss) income	4.1	0.0
Balance at the end of the period	(36.4)	(40.5)	(40.5)
Foreign currency translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(43.1)	(82.5)
Other comprehensive (loss) income before reclassifications	(11.9)	39.4
Other comprehensive (loss) income	(11.9)	39.4
Balance at the end of the period	(55.0)	(43.1)	(82.5)
Derivative contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(13.4)	(1.1)
Other comprehensive (loss) income before reclassifications	6.2	(10.3)
Amounts reclassified from accumulated other comprehensive income (loss)	(6.6)	(2.0)
Other comprehensive (loss) income	(0.4)	(12.3)
Balance at the end of the period	(13.8)	(13.4)	(1.1)
Accumulated Other Comprehensive Income (loss).
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(97.0)	(124.1)	(122.1)
Other comprehensive (loss) income	(8.2)	27.1	(2.0)
Balance at the end of the period	$ (105.2)	$ (97.0)	$ (124.1)