Debt - Revolving Loan Arrangements (Details) $ in Millions	Mar. 31, 2020 USD ($)
Revolving lines of credit
Total Amount Committed by Lenders	$ 845.3
Outstanding Borrowings	196.3
Outstanding Letters of Credit	133.8
Total Amount Available	$ 515.2
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 Borrowings	196.3
Outstanding Letters of Credit	0.3
Total Amount Available	$ 403.4
Other revolving loans
Revolving lines of credit
Weighted Average Interest Rate (as a percent)	0.00%
Total Amount Committed by Lenders	$ 245.3
Outstanding Letters of Credit	133.5
Total Amount Available	$ 111.8