Leases - Summary of Lease-Related Assets and Liabilities (Details) $ in Millions	Jun. 30, 2020 USD ($)
Operating leases:
Right-of-use asset	$ 60.2
Current portion of lease liabilities	19.4
Lease liabilities	47.8
Total operating lease liabilities	67.2
Finance leases:
Right-of-use asset	23.1
Current portion of lease liabilities	9.2
Lease liabilities	8.0
Total finance lease liabilities	$ 17.2