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Leases (Tables)
 6 Months Ended
Jun. 30, 2023
Leases [Abstract]  
Schedule of Lease, Cost The components of lease expense were as follows:
Three Months Ended
June 30,		Six Months Ended
June 30,
($ in millions)2023202220232022
Operating lease cost$4.8 $3.4 $10.7 $6.7 
Short-term lease cost1.2 0.4 2.5 0.8 
Variable lease cost1.3 1.0 3.0 2.4 
Total lease cost$7.3 $4.8 $16.2 $9.9 
Schedule of Cash Flow and Supplemental Information Supplemental cash flow information related to leases were as follows:
Three Months Ended
June 30,		Six Months Ended
June 30,
($ in millions)2023202220232022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$5.0 $3.1 $9.9 $6.3 
Right-of-use assets obtained in exchange for new operating lease liabilities$2.9 $5.8 $3.5 $15.5 
Schedule of Lessee, Operating Lease, Liability, Maturity Maturities of operating lease liabilities were as follows:
($ in millions)June 30,December 31,
Year20232022
2023 (remaining period as of)$9.9 $19.0 
202418.6 18.1 
202516.7 16.0 
202613.8 13.4 
20279.4 9.4 
Thereafter51.5 50.8 
119.9 126.7 
Less: imputed lease interest(16.4)(17.7)
Total lease liabilities$103.5 $109.0