Debt - Revolving Loan Arrangements (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 11, 2019
Revolving lines of credit
Total Amount Committed by Lenders	$ 732.9
Total Amount Uncommitted by Lenders	103.3
Outstanding Letters of Credit	133.0
Total Amounts Available	$ 703.2
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	0.1
Total Amounts Available	$ 599.9
Bank guarantees and working capital line
Revolving lines of credit
Weighted Average Interest Rate (as a percent)	0.00%
Total Amount Committed by Lenders	$ 132.9
Total Amount Uncommitted by Lenders	103.3
Outstanding Letters of Credit	132.9
Total Amounts Available	$ 103.3