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v3.25.1

Debt (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
Debt |
Summary of debt | ​
​ | ​ | ​ | ​ | ​ | ​
​ | March 31, | ​ | December 31,
​ | 2025 |  | 2024
​ | (in millions)
Unsecured revolving credit facility maturing September 10, 2029 | $ | 330.0 | ​ | $ | —
Senior unsecured notes, interest payable semi-annually at 1.30%, effective rate of 1.53%, maturing August 15, 2025 | ​ | 400.0 | ​ | ​ | 400.0
Senior unsecured notes, interest payable semi-annually at 2.15%, effective rate of 2.27%, maturing August 15, 2030 | ​ | 500.0 | ​ | ​ | 500.0
Senior unsecured notes, interest payable semi-annually at 6.85%, effective rate of 6.91%, maturing November 15, 2036 | ​ | 250.0 | ​ | ​ | 250.0
Other notes | ​ | 1.1 | ​ | ​ | 1.1
Total | ​ | 1,481.1 | ​ | ​ | 1,151.1
Less: unamortized discount and debt issuance costs | ​ | (8.1) | ​ | ​ | (8.6)
Less: amounts due within one year | ​ | (399.9) | ​ | ​ | (399.7)
Total long-term debt | $ | 1,073.1 | ​ | $ | 742.8

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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