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Leases (Tables)
 6 Months Ended
Jun. 30, 2023
Leases [Abstract]  
Lease, Cost
The components of lease expense were as follows: 
Three Months Ended June 30,Six Months Ended June 30,
2023202220232022
Operating lease cost:
Amortization of right-of-use assets$0.9 $1.4 $2.0 $2.8 
Interest on lease liabilities0.2 0.3 0.4 0.6 
Total operating lease cost$1.1 $1.7 $2.4 $3.4 
Schedule of Leases Supplemental Balance Sheets
Supplemental balance sheet information related to lessee activities is as follows:
LeasesClassificationJune 30, 2023December 31, 2022
Operating lease right-of-use assetsOther assets$15.7 $19.4 
Operating lease liabilities, current portionOther current liabilities$3.6 $5.8 
Operating lease liabilitiesOther liabilities13.1 14.8 
Total operating lease liabilities$16.7 $20.6 
Operating leases:
Weighted average remaining lease term (years)6.35.9
Weighted average discount rate4.5 %4.1 %