Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies Loans and Debentures (Details)

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Commitments and Contingencies Loans and Debentures (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended
Sep. 30, 2012
DoT loan [Member]
Sep. 29, 2013
Total Loans and Debentures [Member]
Sep. 30, 2012
Total Loans and Debentures [Member]
Sep. 25, 2011
Total Loans and Debentures [Member]
Sep. 30, 2012
Loans Payable [Member]
Jun. 30, 2013
Debentures [Member]
Sep. 29, 2013
Loans Payable [Member]
Sep. 29, 2013
DoT loan [Member]
Oct. 15, 2013
Subsequent Event [Member]
DoT loan [Member]
Total Debt [Line Items]                  
Payment made to India's Department of Telecommunications $ 81                
Repayments of short-term debt           492      
Cash paid for interest   92 88 94          
Interest rate at end of period               10.20%  
Debt Instrument Basis Spread On Variable Rate               0.25%  
Maturity date         Dec. 18, 2012   Dec. 01, 2014    
Repayments of Long-term Debt             $ 368   $ 67