Segment Information QWI Reportable Segment (Details) (USD $) In Millions | 12 Months Ended | ||
|---|---|---|---|
Sep. 25, 2011 | Sep. 26, 2010 | Sep. 27, 2009 | |
| Revenues Aggregated into the QWI Reportable Segment [Line items] | |||
| Revenues aggregated into the QWI reportable segment | $ 656 | $ 628 | $ 641 |
QES [Member] | |||
| Revenues Aggregated into the QWI Reportable Segment [Line items] | |||
| Revenues aggregated into the QWI reportable segment | 395 | 376 | 344 |
QIS [Member] | |||
| Revenues Aggregated into the QWI Reportable Segment [Line items] | |||
| Revenues aggregated into the QWI reportable segment | 150 | 173 | 229 |
QGOV [Member] | |||
| Revenues Aggregated into the QWI Reportable Segment [Line items] | |||
| Revenues aggregated into the QWI reportable segment | 100 | 74 | 66 |
Firethorn [Member] | |||
| Revenues Aggregated into the QWI Reportable Segment [Line items] | |||
| Revenues aggregated into the QWI reportable segment | 11 | 7 | 3 |
Eliminations [Member] | |||
| Revenues Aggregated into the QWI Reportable Segment [Line items] | |||
| Revenues aggregated into the QWI reportable segment | $ 0 | $ (2) | $ (1) |