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Pensions and Postretirement Benefits Other Than Pensions (Schedule of Pretax Amounts Recognized in Accumulated Other Comprehensive Income or (Loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Current year changes recorded to Accumulated other comprehensive income (loss) | $ (0.1) | $ 16.8 | $ 54.2
Amortization reclassified to earnings | (5.4) | (7.4) | (21.6)
Stockholders' Equity Note, Spinoff Transaction |  |  | (18.9)
Pension Plans [Member] |  |  |
Balance at December 31, 2013 | (503.8) |  |
Current year changes recorded to Accumulated other comprehensive income (loss) | 3.2 |  |
Amortization reclassified to earnings | 18.0 |  |
Settlements/curtailments reclassified to earnings | 1.0 | 1.4 | $ 15.0
Currency translation and other | 2.1 |  |
Balance at December 31, 2014 | (479.5) | (503.8) |
Pension Plans [Member] | Net Actuarial Losses [Member] |  |  |
Balance at December 31, 2013 | (485.8) |  |
Current year changes recorded to Accumulated other comprehensive income (loss) | 3.2 |  |
Amortization reclassified to earnings | 15.0 |  |
Settlements/curtailments reclassified to earnings | (1.0) |  |
Currency translation and other | 1.9 |  |
Balance at December 31, 2014 | (464.7) | (485.8) |
Pension Plans [Member] | Prior Service Cost [Member] |  |  |
Balance at December 31, 2013 | (18.0) |  |
Current year changes recorded to Accumulated other comprehensive income (loss) | 0.0 |  |
Amortization reclassified to earnings | 3.0 |  |
Settlements/curtailments reclassified to earnings | 0.0 |  |
Currency translation and other | 0.2 |  |
Balance at December 31, 2014 | $ (14.8) | $ (18.0) |

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