Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Property, Plant and Equipment [Line Items]
Gross Property, Plant and Equipment	$ 371	$ 288
Less accumulated depreciation	(144)	(108)
Net Property, Plant and Equipment	227	180
Land
Property, Plant and Equipment [Line Items]
Gross Property, Plant and Equipment	16	16
Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Property, Plant and Equipment	109	81
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Gross Property, Plant and Equipment	16	13
Computer Hardware and Software
Property, Plant and Equipment [Line Items]
Gross Property, Plant and Equipment	191	155
Construction in Progress
Property, Plant and Equipment [Line Items]
Gross Property, Plant and Equipment	28	14
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Gross Property, Plant and Equipment	$ 11	$ 9