Financial Instruments (Tables)

6 Months Ended

Mar. 30, 2012

Financial Instruments

Assets and Liabilities Measured at Fair Value on a Recurring Basis

	As of March 30, 2012
($ in millions)	Level 1		Level 2		Total
Available-for-Sale Securities:
Corporate debt securities	$	—	$	31	$	31
U.S. Government debt securities		82		92		174
Total	$	82	$	123	$	205

	As of September 30, 2011
($ in millions)	Level 1		Level 2		Total
Available-for-Sale Securities:
Corporate debt securities	$	—	$	43	$	43
U.S. Government debt securities		101		103		204
Total	$	101	$	146	$	247