Debt - Maturing within One Year (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Short-term foreign debt	$ 186.3	$ 144.9
Total short-term debt	186.3	144.9
Current portion of long-term debt	63.9	82.8
Total short-term debt and current portion of long-term debt	$ 250.2	$ 227.7
Short-term foreign debt
Short-term Debt [Line Items]
Average effective interest rate	13.60%