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Segment Results (Reconciliation of Total Segment Operating Income To Earnings Before Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Segment Reporting [Abstract] |  |  |  |
Total segment operating income | $ 133.8 | $ 123.2 | $ 228.0 | $ 221.7
Interest expense | 7.8 | 8.6 | 15.1 | 17.1
Other non-operating (income), net | (0.9) | (0.7) | (2.4) | (1.4)
Earnings before income taxes | $ 126.9 | $ 115.3 | $ 215.3 | $ 206.0

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