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Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Millions | Mar. 31, 2016 | Sep. 30, 2015
--- | --- | ---
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Value, finite lives | $ 160 | $ 160
Accumulated Amortization | (11) | (7)
Net Intangible Assets, finite lives | 149 | 153
Developed Technologies [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Value, finite lives | 49 | 48
Accumulated Amortization | (2) | (1)
Net Intangible Assets, finite lives | 47 | 47
Trademarks [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Value, finite lives | 16 | 16
Accumulated Amortization | (1) |
Net Intangible Assets, finite lives | 15 | 16
Customer Relationships [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Value, finite lives | 95 | 96
Accumulated Amortization | (8) | (6)
Net Intangible Assets, finite lives | $ 87 | $ 90

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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=26713463&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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