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Goodwill And Intangible Assets (Schedule Of Carrying Value And Accumulated Amortization For Intangible Assets) (Details) - USD ($) $ in Millions | Sep. 30, 2018 | Sep. 30, 2017
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 1,036.0 | $ 1,052.7
Accumulated Amortization | (458.6) | (421.3)
Net | 577.4 | 631.4
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 701.3 | 705.5
Accumulated Amortization | (275.3) | (255.5)
Net | 426.0 | 450.0
Technology Assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 181.5 | 181.4
Accumulated Amortization | (78.2) | (61.1)
Net | 103.3 | 120.3
Tradenames [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 153.2 | 165.8
Accumulated Amortization | (105.1) | (104.7)
Net | $ 48.1 | $ 61.1

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