Shareholders' Equity - Components of Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Millions	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ 2,145.9	$ 2,187.7	$ 2,234.1	$ 2,449.8	$ 2,509.4	$ 2,458.1
Gain on interest rate swap, net of income taxes of $0.3 on both dates
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	0.9		1.1
Defined benefit pension plans, net of income tax benefit of $(22.6) and $(23.0), respectively
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(36.8)		(36.0)
Retiree health care plan, net of income taxes of $1.9 and $2.0, respectively
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	1.0		1.3
Foreign currency translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(339.7)		(261.2)
Translation loss on long-term intercompany loans, net of income taxes of $19.1 on both dates
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(133.5)		(133.6)
Gain (Loss) on derivative instruments, net of income tax benefit of $(9.7) and $(22.7), respectively
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	7.7		(37.6)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (500.4)	$ (495.5)	$ (466.0)	$ (459.5)	$ (451.6)	$ (458.7)