Financial Instruments (Tables)

12 Months Ended

Sep. 28, 2012

Financial Instruments

Cost and fair market value of investments by type of security and balance sheet classification

As of September 28, 2012 ($ in millions):

					Fair Value						Consolidated Balance Sheet Classification
Type of Security	Cost Basis		Gross Unrealized Gain		Level 1		Level 2		Total		Prepaids and Other Current Assets		Other Assets
Corporate debt securities	$	33	$	1	$	—	$	34	$	34	$	7	$	27
U.S. Government debt securities		167		2		86		83		169		63		106
	$	200	$	3	$	86	$	117	$	203	$	70	$	133

As of September 30, 2011 ($ in millions):

					Fair Value						Consolidated Balance Sheet Classification
Type of Security	Cost Basis		Gross Unrealized Gain		Level 1		Level 2		Total		Prepaids and Other Current Assets		Other Assets
Corporate debt securities	$	43	$	—	$	—	$	43	$	43	$	11	$	32
U.S. Government debt securities		200		4		101		103		204		49		155
	$	243	$	4	$	101	$	146	$	247	$	60	$	187

Schedule of debt securities by maturity date

	Cost Basis		Fair Value
Due in one year or less	$	69	$	70
Due after one year through five years		131		133
Total	$	200	$	203