Leases - Maturity of Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 67.8
Lessee, Operating Lease, Liability, Payments, Due Year Two	54.1
Lessee, Operating Lease, Liability, Payments, Due Year Three	43.8
Lessee, Operating Lease, Liability, Payments, Due Year Four	37.2
Lessee, Operating Lease, Liability, Payments, Due Year Five	29.8
Lessee, Operating Lease, Liability, Payments, Due after Year Five	144.5
Lessee, Operating Lease, Liability, Payments, Due	377.2
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	115.5
Operating Lease, Liability	261.7
Operating Lease, Liability, Current	49.6	$ 0.0
Operating Lease, Liability, Noncurrent	$ 212.1
Maximum [Member]
Lessee, Lease Liability, Maturity [Line Items]
Lessee Remaining Lease Term	20 years
Lessee, Operating Lease, Renewal Term	32 years
Minimum [Member]
Lessee, Lease Liability, Maturity [Line Items]
Lessee, Operating Lease, Renewal Term	1 year