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Nature of Operations and Significant Accounting Policies (Summary Of Intangible Assets) (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Amortization Period of Finite Lived Assets (in years) | 17 years 9 months 18 days |  |  |
Gross Asset | $ 892.2 | $ 908.2 |  |
Accumulated Amortization | 426.3 | 389.1 |  |
Net | $ 465.9 | 519.1 | $ 503.7 | $ 478.3
Intellectual property rights |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Amortization Period of Finite Lived Assets (in years) | 15 years 2 months 12 days |  |  |
Gross Asset | $ 131.9 | 133.2 |  |
Accumulated Amortization | 54.3 | 53.4 |  |
Net | $ 77.6 | 79.8 |  |
Customer relationships and backlog |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Amortization Period of Finite Lived Assets (in years) | 18 years 3 months 18 days |  |  |
Gross Asset | $ 611.8 | 623.7 |  |
Accumulated Amortization | 270.1 | 241.9 |  |
Net | $ 341.8 | 381.8 |  |
Drawings |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Amortization Period of Finite Lived Assets (in years) | 40 years |  |  |
Gross Asset | $ 11.1 | 11.1 |  |
Accumulated Amortization | 10.6 | 10.5 |  |
Net | $ 0.5 | 0.6 |  |
Other |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Amortization Period of Finite Lived Assets (in years) | 11 years 9 months 18 days |  |  |
Gross Asset | $ 137.4 | 140.2 |  |
Accumulated Amortization | 91.3 | 83.3 |  |
Net | $ 46.0 | $ 56.9 |  |

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