Leases - Summary of Supplemental Balance Sheet Information (Details) $ in Millions	Dec. 31, 2019 USD ($)
Other non-current assets:
Finance leases - ROU assets	$ 54.8
Finance leases - Accumulated depreciation	(15.0)
Operating lease right-of-use-assets:
Operating leases - ROU assets	118.8
Operating leases - Accumulated depreciation	(28.7)
Total lease assets	129.9
Current portion of long-term debt:
Finance leases	(10.4)
Current portion of operating lease liabilities:
Operating leases	(26.2)
Long-term debt, less current portion:
Finance leases	(28.7)
Long-term operating lease liabilities, less current portion:
Operating leases	(65.7)
Total lease liabilities	$ (131.0)