Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value, finite lives	$ 326	$ 267
Gross Carrying Value	383	324
Accumulated Amortization	(29)	(16)
Net Intangible Assets, finite lives	297	251
Net Intangible Assets	354	308
Trademarks, Indefinite Lives [Member]
Finite-Lived Intangible Assets [Line Items]
Net Intangible Assets, Trademarks, indefinite lives	57	57
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value, finite lives	155	154
Accumulated Amortization	(15)	(9)
Net Intangible Assets, finite lives	140	145
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value, finite lives	171	113
Accumulated Amortization	(14)	(7)
Net Intangible Assets, finite lives	$ 157	$ 106