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Long-Term Debt - Summary of Long-Term Debt (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Long-term debt |  |
Debt issuance costs, net | $ (17.0) | $ (16.6)
Long-term Debt, Total | 2,204.5 | 2,204.6
Net long-term debt | 2,204.5 | 2,204.6
3.15% Senior notes due August 1, 2027 |  |
Long-term debt |  |
Senior notes | 425.0 | 425.0
Less: Discount | (0.1) | (0.1)
2.3% Senior notes due December 15, 2031 |  |
Long-term debt |  |
Senior notes | 400.0 | 400.0
Less: Discount | (0.5) | (0.6)
5.6% Senior notes due November 15, 2032 |  |
Long-term debt |  |
Senior notes | 500.0 | 500.0
Less: Discount | (0.7) | (0.8)
3.95% Senior notes due August 1, 2047 |  |
Long-term debt |  |
Senior notes | 400.0 | 400.0
Less: Discount | (2.1) | (2.2)
5.00% Senior notes due June 15, 2052 |  |
Long-term debt |  |
Senior notes | 500.0 | 500.0
Less: Discount | $ (0.1) | $ (0.1)

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