Debt - Revolving Loan Arrangements (Details) $ in Millions	Dec. 31, 2018 USD ($)
Revolving lines of credit
Total Amount Committed by Lenders	$ 765.8
Outstanding Borrowings	114.5
Outstanding Letters of Credit	138.3
Total Amount Available	$ 513.0
US Dollar revolving loan | 2015 Credit Agreement
Revolving lines of credit
Weighted Average Interest Rate (as a percent)	1.40%
Total Amount Committed by Lenders	$ 500.0
Outstanding Borrowings	111.6
Outstanding Letters of Credit	1.3
Total Amount Available	$ 387.1
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	2.9
Total Amount Available	$ 1.1
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
Total Amount Available	5.3
Other lines of credit
Revolving lines of credit
Total Amount Committed by Lenders	256.5
Outstanding Letters of Credit	137.0
Total Amount Available	$ 119.5