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Note 3, Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2017	Sep. 30, 2016
Product Warranty Accrual Disclosure [Abstract]
Intangible Assets, Gross (Excluding Goodwill)	$ 203	$ 199
Finite-Lived Intangible Assets, Accumulated Amortization	(101)	(86)
Intangible Assets, Net (Excluding Goodwill)	102	113
Patents [Member]
Product Warranty Accrual Disclosure [Abstract]
Intangible Assets, Gross (Excluding Goodwill)	25	28
Finite-Lived Intangible Assets, Accumulated Amortization	(13)	(13)
Intangible Assets, Net (Excluding Goodwill)	12	15
Customer Relationships [Member]
Product Warranty Accrual Disclosure [Abstract]
Intangible Assets, Gross (Excluding Goodwill)	102	100
Finite-Lived Intangible Assets, Accumulated Amortization	(56)	(48)
Intangible Assets, Net (Excluding Goodwill)	46	52
Trademarks [Member]
Product Warranty Accrual Disclosure [Abstract]
Intangible Assets, Gross (Excluding Goodwill)	57	56
Finite-Lived Intangible Assets, Accumulated Amortization	(23)	(19)
Intangible Assets, Net (Excluding Goodwill)	34	37
Other Intangible Assets [Member]
Product Warranty Accrual Disclosure [Abstract]
Intangible Assets, Gross (Excluding Goodwill)	19	15
Finite-Lived Intangible Assets, Accumulated Amortization	(9)	(6)
Intangible Assets, Net (Excluding Goodwill)	$ 10	$ 9

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Product Warranty Accrual Disclosure [Abstract]

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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

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

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