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Nature of Operations and Significant Accounting Policies (Summary Of Intangible Assets) (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Amortization Period of Finite Lived Assets (in years) | 17 years 10 months 24 days |  |  |
Gross Asset | $ 920.0 | $ 941.7 |  |
Accumulated Amortization | 503.4 | 474.6 |  |
Net | $ 416.6 | 467.1 | $ 520.3 | $ 505.1
Intellectual property rights |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Amortization Period of Finite Lived Assets (in years) | 15 years 1 month 6 days |  |  |
Gross Asset | $ 132.1 | 136.8 |  |
Accumulated Amortization | 59.1 | 59.2 |  |
Net | $ 73.0 | 77.6 |  |
Customer relationships and backlog |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Amortization Period of Finite Lived Assets (in years) | 18 years 4 months 24 days |  |  |
Gross Asset | $ 635.5 | 651.7 |  |
Accumulated Amortization | 329.8 | 308.8 |  |
Net | $ 305.7 | 342.9 |  |
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 | 10.7 | 10.6 |  |
Net | $ 0.4 | 0.5 |  |
Other |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Amortization Period of Finite Lived Assets (in years) | 11 years 8 months 12 days |  |  |
Gross Asset | $ 141.3 | 142.1 |  |
Accumulated Amortization | 103.8 | 96.0 |  |
Net | $ 37.5 | $ 46.1 |  |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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