Segment Information (Details) (USD $)	12 Months Ended
	Sep. 25, 2011	Sep. 26, 2010	Sep. 27, 2009
Notes to Financial Statements [Abstract]
Number of aggregated divisions	4
Revenues, EBT and Total Assets for Reportable Segments [Line items]
FLO TV assets included in QSI's assets	$ 913,000,000	$ 1,300,000,000	$ 1,300,000,000
Investments in equity method investees included in QSI's assets	20,000,000	20,000,000	10,000,000
QMT included in reconciling items	806,000,000	384,000,000	389,000,000
Net book values of long-lived assets located outside of the United States	629,000,000	221,000,000	256,000,000
Net book values of long-lived assets located in the United States	1,800,000,000	2,200,000,000	2,100,000,000
Unallocated cost of equipment and services revenue resulting from acquisitions	143,000,000
Unallocated selling, general and administrative expenses resulting from acquisitions	59,000,000
Unallocated research and development expenses resulting from acquisitions	$ 6,000,000