Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended			3 Months Ended		9 Months Ended
	May 31, 2014	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2014 Cost of Sales and Selling and Administrative Expenses [Member]	Jun. 30, 2013 Cost of Sales and Selling and Administrative Expenses [Member]	Jun. 30, 2014 Cost of Sales and Selling and Administrative Expenses [Member]	Jun. 30, 2013 Cost of Sales and Selling and Administrative Expenses [Member]	Jun. 30, 2014 Minimum [Member]	Jun. 30, 2014 Maximum [Member]	Jun. 30, 2014 Weighted Average [Member]	Sep. 30, 2013 Advanced Technologies [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill		$ 555	$ 502								$ 2
Goodwill annual impairment	0
Net intangible assets			2
Useful life of intangible assets								16 years	20 years	19 years
Amortization of intangible assets				4	4	13	10
Amortization expense estimated for year one		17
Amortization expense estimated for year two		17
Amortization expense estimated for year three		17
Amortization expense estimated for year four		17
Amortization expense estimated for year five		17
Asset impairment charges	$ 0