Leases - Schedule of components of operating and finance leased asset (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Assets
Right-of-use assets	$ 454.2	$ 0.0
Leasehold improvements, equipment and construction in progress, net	16.9
Total leased assets	471.1
Current
Short-term lease liability	117.6	0.0
Current portion of long-term obligations under credit facility and other long-term borrowings	2.4
Noncurrent
Long-term lease liability	348.4	$ 0.0
Other long-term borrowings	14.5
Total lease liabilities	482.9
Finance lease, accumulated amortization	$ 0.8