Goodwill and Other Intangible Assets (Gross Carrying Amounts and Accumulated Amortization of Other Intangible Assets) (Details) - USD ($) $ in Millions |
Mar. 31, 2016 |
Sep. 25, 2015 |
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross carrying amount | $ 8,264 | $ 8,188 |
| Accumulated amortization | (5,281) | (5,189) |
| Customer-Related Intangible Assets [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross carrying amount | 8,223 | 8,147 |
| Accumulated amortization | (5,274) | (5,183) |
| Other Intangible Assets [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross carrying amount | 41 | 41 |
| Accumulated amortization | $ (7) | $ (6) |