Shareholders' Equity - Components of Accumulated Other Comprehensive Loss, Net of Tax (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, income taxes	$ (22.2)	$ (22.8)
Retiree health care plan, net of income taxes of $x and $1.6, respectively
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, income taxes	1.5	1.6
Translation gain (loss) on derivative instruments, net of income taxes (benefit) of $x and $(16.4), respectively
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, income taxes	$ 19.8	$ (16.4)