Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Payments	$ 16.3	$ 13.0	$ 12.4
Lessee, operating lease, leases not yet commenced, aggregated commitment	36.9
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	15.1
Operating lease right of use asset	133.0	72.5
Operating lease liability	$ 142.8	$ 79.9
Operating Lease, Weighted Average Discount Rate, Percent	2.14%	2.80%	3.08%
Operating Lease, Weighted Average Remaining Lease Term	7 years 6 months	7 years 8 months 12 days	8 years 4 months 24 days
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 20.7
Lessee, Operating Lease, Liability, Payments, Due Year Three	22.7
Lessee, Operating Lease, Liability, Payments, Due Year Four	18.3
Lessee, Operating Lease, Liability, Payments, Due Year Five	19.3
Lessee, Operating Lease, Liability, Payments, Due after Year Five	60.2
Lessee, Operating Lease, Liability, Payments, Due	156.3
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	13.5
Lease, Cost	18.8	$ 14.0	$ 12.9
Lessee, operating lease, other cost	3.8	3.9	4.0
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 76.7	$ 11.8	$ 43.7
Lessee, Lease, Description [Line Items]
Operating Lease, Weighted Average Remaining Lease Term	7 years 6 months	7 years 8 months 12 days	8 years 4 months 24 days