Other Operating Expense, Net - Summary (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Operating Expense, Net [Abstract]
Foreign currency transaction losses (gains), net	$ 1.1	$ 5.8	$ (13.6)	$ 12.7
Restructuring charges, net	1.1	10.0	10.3	77.4
Acquisition and other transaction related expenses	14.0	9.0	37.6	76.8
Other, net	1.3	0.7	2.6	3.2
Total other operating expense, net	$ 17.5	$ 25.5	$ 36.9	$ 170.1