Annual report pursuant to Section 13 and 15(d)

Discontinued Operations (Details)

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Discontinued Operations (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Sep. 30, 2012
Jun. 24, 2012
Mar. 25, 2012
Dec. 25, 2011
Sep. 25, 2011
Jun. 26, 2011
Mar. 27, 2011
Dec. 26, 2010
Sep. 30, 2012
Sep. 25, 2011
Sep. 26, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Date of completed sale of spectrum                 12/27/2011    
Proceeds from sale of wireless spectrum                 $ 1,925 $ 0 $ 0
Gain on sale of wireless spectrum                 1,179 0 0
Disposal Group, Not Discontinued Operation, Income Statement Disclosures [Abstract]                      
Revenues                 0 5 9
Income (loss) from discontinued operations                 1,203 (507) (459)
Income tax (expense) benefit                 (427) 194 186
Discontinued operations, net of income taxes 23 [1] (3) [1] 761 [1] (5) [1] (6) [1] 44 [1] (269) [1] (82) [1] 776 (313) (273)
Disposal Group, Including Discontinued Operation, Classified Balance Sheet Disclosures [Abstract]                      
Total carrying amount of assets of discontinued operation 59               59    
Total carrying amount of liabilities of discontinued operation 75               75    
Capital lease assets 55               55    
Capital lease liabilities $ 60               $ 60    
[1] Amounts are rounded to millions each quarter. Therefore, the sum of the quarterly amounts may not equal the annual amounts reported.