Restructuring-Related Expenses - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	15 Months Ended	24 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Dec. 31, 2020
Restructuring-Related Expenses
Restructuring-related expenses and business transformation expenses	$ 10.5	$ 126.0
Cash payment	24.5
Productivity and Cost-Savings Initiatives
Restructuring-Related Expenses
Restructuring-related expenses and business transformation expenses	3.2	101.2
Cash payment	19.5
Facility Relocations and Closures, Consulting, and Other
Restructuring-Related Expenses
Restructuring-related expenses and business transformation expenses	7.3	$ 24.8
Cash payment	$ 5.0
Forecast
Restructuring-Related Expenses
Restructuring-related expenses and business transformation expenses			$ 150.0
Forecast | Productivity and Cost-Savings Initiatives
Restructuring-Related Expenses
Restructuring-related expenses and business transformation expenses			110.0
Forecast | Facility Relocations and Closures, Consulting, and Other
Restructuring-Related Expenses
Restructuring-related expenses and business transformation expenses			$ 40.0