Leases Operating Lease, Payments Due (Details) $ in Millions	Mar. 31, 2019 USD ($)
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 21.0
Lessee, Operating Lease, Liability, Payments, Due Year Two	24.7
Lessee, Operating Lease, Liability, Payments, Due Year Three	21.1
Lessee, Operating Lease, Liability, Payments, Due Year Four	17.7
Lessee, Operating Lease, Liability, Payments, Due Year Five	12.1
Lessee, Operating Lease, Liability, Payments, Due after Year Five	49.5
Lessee, Operating Lease, Liability, Payments, Due	146.1
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	24.0
Operating Lease, Liability	$ 122.1