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Goodwill And Intangible Assets (Schedule Of Carrying Value And Accumulated Amortization For Intangible Assets) (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Sep. 30, 2018
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 1,033.7 | $ 1,036.0
Accumulated Amortization | (525.8) | (458.6)
Net | 507.9 | 577.4
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 698.9 | 701.3
Accumulated Amortization | (322.1) | (275.3)
Net | 376.8 | 426.0
Technology Assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 181.5 | 181.5
Accumulated Amortization | (88.9) | (78.2)
Net | 92.6 | 103.3
Tradenames [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 153.3 | 153.2
Accumulated Amortization | (114.8) | (105.1)
Net | $ 38.5 | $ 48.1

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