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Lines of Credit and Financing Arrangements (Tables)
 6 Months Ended
Jun. 30, 2024
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, 2024December 31, 2023
Commercial paper$147.0 $150.0 
Current maturities of long-term debt:
Finance lease obligations$14.0 $12.1 
    Total current maturities of long-term debt
$14.0 $12.1 
Long-Term Debt:
Finance lease obligations$35.0 $32.7 
Credit agreement— 20.0 
Senior unsecured notes1,100.0 1,100.0 
Debt issuance costs(8.2)(9.6)
Total long-term debt$1,126.8 $1,143.1 
Total debt$1,287.8 $1,305.2 
Summary of weighted average borrowing rate facility
Our weighted average borrowing rate on the Program was as follows as of:
June 30, 2024December 31, 2023
Weighted average borrowing rate5.56 %5.66 %
Our weighted average borrowing rate on the facility was as follows as of:
June 30, 2024December 31, 2023
Weighted average borrowing rate— %6.67 %