Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	$ 78.1	$ (49.8)	$ (50.0)
Total other comprehensive income (loss), Tax	2.3	(6.8)	(6.1)
Other comprehensive income (loss)	80.4	(56.6)	(56.1)
Cumulative translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	87.8	(74.9)	(75.6)
Total other comprehensive income (loss), Tax	0.0	0.0	0.0
Other comprehensive income (loss)	87.8	(74.9)	(75.6)
Net (loss) gain arising during the year
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	(8.2)	24.6	12.0
Total other comprehensive income (loss), Tax	1.9	(6.7)	(2.9)
Other comprehensive income (loss)	(6.3)	17.9	9.1
Amortization and settlement gain
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	(1.5)	0.5	10.3
Total other comprehensive income (loss), Tax	0.4	(0.1)	(2.4)
Other comprehensive income (loss)	(1.1)	0.4	7.9
Pension and other postretirement adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	(9.7)	25.1	22.3
Total other comprehensive income (loss), Tax	2.3	(6.8)	(5.3)
Other comprehensive income (loss)	(7.4)	18.3	17.0
Reclassification adjustments for derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	0.0	0.0	3.3
Total other comprehensive income (loss), Tax	0.0	0.0	(0.8)
Other comprehensive income (loss)	$ 0.0	$ 0.0	2.5
Reclassification adjustments for derivatives | Acceleration Due to Cash Settlement on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)			$ 1.3