Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss,Net of Tax (Parenthetical) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Translation gain (loss) on derivative instruments, net of income taxes of $(9.1) and $(12.9), respectively
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, income taxes	$ (9.1)	$ (12.9)
Defined benefit pension plans and Retiree health care plan | Defined benefit pension plans, net of income taxes of $(30.9) and $(23.2), respectively
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, income taxes	(30.9)	(23.2)
Defined benefit pension plans and Retiree health care plan | Retiree health care plan, net of income taxes of $1.6 and $2.0, respectively
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, income taxes	$ 1.6	$ 2.0