Debt - Revolving Loan Arrangements (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 11, 2019
Revolving lines of credit
Total Amount Committed by Lenders	$ 716.2	$ 300.0
Outstanding Letters of Credit	116.4
Total Amounts Available	$ 599.8
2019 Credit Agreement
Revolving lines of credit
Total Amount Committed by Lenders		$ 600.0
2019 Credit Agreement | US Dollar revolving loan
Revolving lines of credit
Weighted Average Interest Rate (as a percent)	1.30%
Total Amount Committed by Lenders	$ 600.0
Outstanding Letters of Credit	0.2
Total Amounts Available	599.8
Bank guarantees and working capital line
Revolving lines of credit
Total Amount Committed by Lenders	116.2
Outstanding Letters of Credit	$ 116.2