Leases - Summary of Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Other non-current assets:
Finance leases - ROU assets	$ 58.0	$ 58.2
Finance leases - Accumulated depreciation	(27.3)	(22.6)
Operating lease right-of-use-assets:
Operating leases - ROU assets	133.5	127.4
Operating leases - Accumulated depreciation	(69.7)	(51.3)
Total lease assets	94.5	111.7
Current portion of long-term debt:
Finance leases	(10.2)	(10.5)
Current portion of operating lease liabilities:
Operating leases	(21.2)	(24.3)
Long-term debt, less current portion:
Finance leases	(19.2)	(23.9)
Long-term operating lease liabilities, less current portion:
Operating leases	(44.5)	(53.2)
Total lease liabilities	$ (95.1)	$ (111.9)
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other non-current assets	Other non-current assets
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current portion of long-term debt	Current portion of long-term debt
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-term debt, less current portion	Long-term debt, less current portion