Debt - Revolving Loan Arrangements (Details) $ in Millions	Mar. 31, 2019 USD ($)
Revolving lines of credit
Total Amount Committed by Lenders	$ 762.5
Outstanding Borrowings	127.4
Outstanding Letters of Credit	132.4
Total Amount Available	$ 502.7
US Dollar revolving loan under the 2015 Credit Agreement
Revolving lines of credit
Weighted Average Interest Rate (as a percent)	1.60%
Total Amount Committed by Lenders	$ 500.0
Outstanding Borrowings	124.8
Outstanding Letters of Credit	1.3
Total Amount Available	$ 373.9
Hain revolving line of credit
Revolving lines of credit
Weighted Average Interest Rate (as a percent)	3.50%
Total Amount Committed by Lenders	$ 4.0
Outstanding Borrowings	2.5
Total Amount Available	$ 1.5
Alicona revolving line of credit
Revolving lines of credit
Weighted Average Interest Rate (as a percent)	0.50%
Total Amount Committed by Lenders	$ 5.3
Outstanding Borrowings	0.1
Total Amount Available	5.2
Other lines of credit
Revolving lines of credit
Total Amount Committed by Lenders	253.2
Outstanding Letters of Credit	131.1
Total Amount Available	$ 122.1