The Company and Its Significant Accounting Policies Goodwill and Other Intangible Assets (Details) | 12 Months Ended | |
|---|---|---|
Sep. 25, 2011 | Sep. 26, 2010 | |
| Weighted-Average Amortization Periods for Finite-Lived Intangible Assets, by Class [Line Items] | ||
| Weighted-average amortization period (in years) | 11 | 14 |
Spectrum Licenses [Member] | ||
| Weighted-Average Amortization Periods for Finite-Lived Intangible Assets, by Class [Line Items] | ||
| Weighted-average amortization period (in years) | 5 | 5 |
Marketing-related [Member] | ||
| Weighted-Average Amortization Periods for Finite-Lived Intangible Assets, by Class [Line Items] | ||
| Weighted-average amortization period (in years) | 9 | 18 |
Technology-based [Member] | ||
| Weighted-Average Amortization Periods for Finite-Lived Intangible Assets, by Class [Line Items] | ||
| Weighted-average amortization period (in years) | 11 | 14 |
Customer-related [Member] | ||
| Weighted-Average Amortization Periods for Finite-Lived Intangible Assets, by Class [Line Items] | ||
| Weighted-average amortization period (in years) | 3 | 5 |