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Maturity of Operating Lease Liabilities (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Leases [Abstract]  
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months $ 1.3
Lessee, Operating Lease, Liability, Payments, Due Year Two 1.0
Lessee, Operating Lease, Liability, Payments, Due Year Three 1.0
Lessee, Operating Lease, Liability, Payments, Due Year Four 1.0
Lessee, Operating Lease, Liability, Payments, Due Year Five 1.0
Lessee, Operating Lease, Liability, Payments, Due after Year Five 0.8
Lessee, Operating Lease, Liability, Payments, Due 6.1
Lessee, Operating Lease, Liability, Undiscounted Excess Amount 2.2
Operating Lease, Liability $ 3.9