Long-Term Debt - Summary (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Long Term Debt
Total long-term debt	$ 1,580.5	$ 1,689.6
Less: current portion	(88.0)	(87.5)
Net long-term debt	1,492.5	1,602.1
US Credit Agreement Revolving Credit Line
Long Term Debt
Total long-term debt		108.0
3.50% senior subordinated notes due 2025
Long Term Debt
Total long-term debt	$ 543.6	$ 543.2
Interest rate (as a percent)	3.50%	3.50%
5.50% senior subordinated notes due 2026
Long Term Debt
Total long-term debt	$ 496.6	$ 496.4
Interest rate (as a percent)	5.50%	5.50%
Australia capital loan agreement
Long Term Debt
Total long-term debt	$ 30.7	$ 32.1
Australia working capital loan agreement
Long Term Debt
Total long-term debt	0.4
Mortgage facilities
Long Term Debt
Total long-term debt	453.7	458.1
Other debt
Long Term Debt
Total long-term debt	$ 55.5	$ 51.8