Restructuring Activities - Restructuring Accrual, Spending and Other Activity and Accrual Balance Remaining (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring accrual at beginning of period	$ 31.5	$ 37.5
Accrual and accrual adjustments	0.6	41.9
Cash payments during period	(11.5)	(47.6)
Effect of changes in foreign currency exchange rates	(1.1)	(0.3)
Restructuring accrual at end of period	$ 19.5	$ 31.5