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Goodwill And Intangible Assets (Summary Of Intangible Assets) (Detail) - USD ($) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 18 years |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 938.3 | $ 890.0 |
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year | 22.5 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 42.2 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 41.8 |  |
Intangible assets, net | 534.4 | 505.1 | $ 481.8
Finite-Lived Intangible Assets, Accumulated Amortization | 403.9 | 384.9 |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 41.6 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | $ 316.6 |  |
Intellectual Property Rights |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 15 years 7 months 6 days |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 135.7 | 134.2 |
Intangible assets, net | 79.1 | 77.4 |
Finite-Lived Intangible Assets, Accumulated Amortization | $ 56.6 | 56.8 |
Customer Relationships |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 18 years 6 months |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 650.3 | 603.1 |
Intangible assets, net | 394.4 | 361.8 |
Finite-Lived Intangible Assets, Accumulated Amortization | $ 255.9 | 241.3 |
Drawings |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 40 years |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 11.1 | 11.1 |
Intangible assets, net | 0.5 | 0.6 |
Finite-Lived Intangible Assets, Accumulated Amortization | $ 10.6 | 10.5 |
Other Intangible Assets |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 11 years 8 months 12 days |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 141.2 | 141.6 |
Intangible assets, net | 60.4 | 65.3 |
Finite-Lived Intangible Assets, Accumulated Amortization | $ 80.8 | $ 76.3 |

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