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Goodwill And Intangible Assets (Changes To Goodwill) (Detail) - USD ($) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Goodwill [Line Items] |  |  |
Balance at beginning of period | $ 1,437.7 |  |
Currency translation | (11.6) |  |
Balance at end of period | 1,426.0 |  |
Intangible Assets, Net (Excluding Goodwill) | 491.3 | $ 519.1 | $ 503.7
Intangibles with indefinite useful lives | 71.2 | $ 70.9 |
Aerospace & Electronics |  |  |
Goodwill [Line Items] |  |  |
Balance at beginning of period | 202.5 |  |
Adjustments to purchase price allocations | 0.0 |  |
Currency translation | 0.0 |  |
Balance at end of period | 202.5 |  |
Process Flow Technologies |  |  |
Goodwill [Line Items] |  |  |
Balance at beginning of period | 360.0 |  |
Adjustments to purchase price allocations | (0.1) |  |
Currency translation | (3.9) |  |
Balance at end of period | 356.0 |  |
Payment & Merchandising Technologies |  |  |
Goodwill [Line Items] |  |  |
Balance at beginning of period | 875.2 |  |
Adjustments to purchase price allocations | 0.0 |  |
Currency translation | (7.7) |  |
Balance at end of period | $ 867.5 |  |

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