Segment Data (Schedule of Segment Reporting Data) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2016 |
Mar. 27, 2015 |
Mar. 31, 2016 |
Mar. 27, 2015 |
|
| Segment Reporting Information [Line Items] | ||||
| Revenue | $ 899 | $ 890 | $ 1,799 | $ 1,777 |
| Adjusted EBITDA | 468 | 444 | 925 | 897 |
| Depreciation and Amortization | 332 | 313 | 659 | 622 |
| United States Segment [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Revenue | 837 | 820 | 1,673 | 1,631 |
| Adjusted EBITDA | 442 | 412 | 871 | 834 |
| Depreciation and Amortization | 311 | 291 | 617 | 576 |
| Canada Segment [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Revenue | 62 | 70 | 126 | 146 |
| Adjusted EBITDA | 26 | 32 | 54 | 63 |
| Depreciation and Amortization | $ 21 | $ 22 | $ 42 | $ 46 |