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 |