Restructuring Costs - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Expense	$ 71.7	$ 4.0	$ 73.0	$ 9.4
Multi-Year Restructuring Program
Restructuring Cost and Reserve [Line Items]
Expense	71.1
Total expected cost	$ 100.0		$ 100.0
Forecast | Multi-Year Restructuring Program
Restructuring Cost and Reserve [Line Items]
Expected cost remaining					$ 25.0	$ 5.0