Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	15 years
Rental expense for operating leases	$ 31.1	$ 51.4	$ 35.3
Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due	$ 5.2
Sublease Income		$ 1.0
Minimum [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Remaining Lease Term	1 year
Operating Lease, Termination Option Period	30 days
Maximum [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Remaining Lease Term	16 years
Operating Lease, Termination Option Period	6 months