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Lines of Credit and Financing Arrangements (Tables)
 6 Months Ended
Jun. 30, 2025
Debt Disclosure [Abstract]  
Summary of outstanding debt obligations
The following table summarizes our outstanding debt obligations and their classification in the accompanying Consolidated Balance Sheets (in millions) as of:

June 30, 2025December 31, 2024
Commercial paper$29.0 $— 
Current maturities of long-term debt:
Finance lease obligations$16.5 $14.9 
Senior unsecured notes300.0 300.0 
Debt issuance costs(0.1)(0.4)
    Total current maturities of long-term debt
$316.4 $314.5 
Long-Term Debt:
Finance lease obligations$42.7 $39.5 
Senior unsecured notes800.0 800.0 
Debt issuance costs(7.0)(6.4)
Total long-term debt$835.7 $833.1 
Total debt$1,181.1 $1,147.6 
Summary of weighted average borrowing rate facility
Our weighted average borrowing rate on the Program was as follows as of:
June 30, 2025December 31, 2024
Weighted average borrowing rate4.57 %— %
Our weighted average borrowing rate on the Amended Credit Agreement was as follows as of:
June 30, 2025December 31, 2024
Weighted average borrowing rate— %— %