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Goodwill And Intangible Assets (Schedule Of Carrying Value And Accumulated Amortization For Intangible Assets) (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Sep. 30, 2017
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 868.5 | $ 884.8
Accumulated Amortization | (325.5) | (297.1)
Net | 543.0 | 587.7
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 668.1 | 671.7
Accumulated Amortization | (249.3) | (222.3)
Net | 418.8 | 449.4
Technology Assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 194.6 | 194.6
Accumulated Amortization | (73.1) | (59.7)
Net | 121.5 | 134.9
Tradenames [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 5.8 | 18.5
Accumulated Amortization | (3.1) | (15.1)
Net | $ 2.7 | $ 3.4

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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