Financial Instruments - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	$ 3,024.4	$ 2,629.5	$ 2,537.7
Other comprehensive (loss) income before reclassifications	44.7	(56.3)
Amounts reclassified from accumulated other comprehensive income (loss)	2.0	3.7
Other comprehensive income (loss)	46.7	(52.6)	(8.2)
Balance at the end of the period	2,829.0	3,024.4	2,629.5
Accrued post-retirement benefit liability
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	(38.2)	(36.4)
Other comprehensive (loss) income before reclassifications	(2.9)	(7.3)
Amounts reclassified from accumulated other comprehensive income (loss)	1.6	5.5
Other comprehensive income (loss)	(1.3)	(1.8)
Balance at the end of the period	(39.5)	(38.2)	(36.4)
Foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	(105.4)	(55.0)
Other comprehensive (loss) income before reclassifications	46.1	(50.4)
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.0
Other comprehensive income (loss)	46.1	(50.4)
Balance at the end of the period	(59.3)	(105.4)	(55.0)
Derivative contracts and other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	(14.2)	(13.8)
Other comprehensive (loss) income before reclassifications	1.5	1.4
Amounts reclassified from accumulated other comprehensive income (loss)	0.4	(1.8)
Other comprehensive income (loss)	1.9	(0.4)
Balance at the end of the period	(12.3)	(14.2)	(13.8)
Accumulated Other Comprehensive Income (loss).
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	(157.8)	(105.2)	(97.0)
Other comprehensive income (loss)	46.7	(52.6)	(8.2)
Balance at the end of the period	$ (111.1)	$ (157.8)	$ (105.2)