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Divestitures - External Sales and Pretax Earnings (Details) - Held for sale - Aerospace products group - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
External sales | $ 28.6 | $ 44.9 | $ 132.2 | $ 138.0
Pretax earnings (excluding corporate overhead) | $ 3.2 | $ 5.3 | $ 19.7 | $ 13.2

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