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Leases Leases (Tables)
 12 Months Ended
Dec. 31, 2024
Leases [Abstract]  
Lease, Cost [Table Text Block]
Year Ended December 31,
(in millions)Classification202420232022
Operating lease cost (1)
Operations expense$3.0 $3.0 $2.9 
(1) Includes short-term leases and variable lease costs, which are not material.
Schedule of Leases Reported on Consolidated Statement of Financial Position [Table Text Block]
The following table presents the balance and classifications of our right of use assets and lease liabilities included in our consolidated balance sheets at December 31, 2024 and 2023:
(in millions)Balance sheet classificationDecember 31, 2024December 31, 2023
Assets 
Operating lease assetsOperating lease right-of-use assets$10.5 $12.4 
Liabilities
Current
Operating lease liabilitiesOther accrued liabilities$2.4 $2.4 
Noncurrent
Operating lease liabilitiesOperating lease - liabilities 8.7 10.6 
Total lease liabilities $11.1 $13.0 
Leases, Weighted Average Remaining Lease Term [Table Text Block]
The following table presents our weighted-average remaining lease term and weighted-average discount rate for our operating leases at December 31, 2024 and 2023:
December 31, 2024December 31, 2023
Weighted-average remaining lease term (in years)
 
Operating leases7.78.1
Weighted-average discount rate
Operating leases3.5 %3.5 %
Lease, Cash Flow [Table Text Block]
The following table presents additional information related to cash paid for amounts included in the measurement of lease liabilities included in our consolidated statements of cash flows at December 31, 2024, 2023 and 2022:
Year Ended December 31,
(in millions)202420232022
Operating cash flows from operating leases$2.9 $2.9 $2.9 
Lessee, Operating Lease, Liability, to be Paid, Maturity
The following table presents the future undiscounted maturities of our operating and financing leases at December 31, 2024 and for each of the next five years and thereafter:
(in millions)
Operating Leases (1)
2025$2.6 
20261.9 
20271.6 
20281.2 
20291.1 
Thereafter4.1 
Total lease payments12.5 
Less: Interest(1.4)
Present value of lease liabilities$11.1 
(1) Operating lease payments include $2.0 million related to options to extend lease terms that are reasonably certain of being exercised.