Acquisitions (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended		1 Months Ended		9 Months Ended
	Jul. 31, 2012	Jun. 30, 2013	Jun. 30, 2012 Acquisition-related Costs [Member]	Jun. 30, 2013 Nhumo [Member]	Jun. 30, 2013 Trademarks [Member]	Jun. 30, 2013 Customer Relationships [Member]	Jun. 30, 2013 Developed Technology [Member]
Business Acquisition [Line Items]
Acquisition paying	$ 1,100			$ 105
Intangible assets						110	150
Intangible assets					57
Amortized period		19 years				18 years	20 years
Fair value of the assets acquired includes trade receivables		46
Non-recurring adjustments in proforma earnings			19
Percentage acquisition				60.00%
Cash paid on acquisition				80
Preferred stock issued on acquisition				25
Dividend percentage of preferred stock				6.00%
Preferred Stock Redemption Amount				$ 25