Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies Loans and Debentures (Details)

v2.4.0.6
Commitments and Contingencies Loans and Debentures (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Sep. 30, 2012
Sep. 25, 2011
Sep. 26, 2010
Short-term Debt [Line Items]      
Payment made to India's Department of Telecommunications $ 81    
Total Loans and Debentures [Member]
      
Short-term Debt [Line Items]      
Carrying value and approximate fair value 1,100 994  
Cash paid for interest 88 94 15
Loans [Member]
      
Short-term Debt [Line Items]      
Carrying value and approximate fair value 468    
Spread on variable interest rate 0.25%    
Interest rate at end of period 10.00%    
Maturity date Dec. 18, 2012    
DoT loan [Member]
      
Short-term Debt [Line Items]      
Payment made to India's Department of Telecommunications 81    
Carrying value and approximate fair value 77    
Spread on variable interest rate 0.25%    
Interest rate at end of period 10.50%    
Maturity date Dec. 18, 2012    
Debentures [Member]
      
Short-term Debt [Line Items]      
Carrying value and approximate fair value $ 519    
Interest rate at end of period 10.25%    
Maturity date Jun. 25, 2017    
Issuance date May 29, 2012    
Earliest date to demand redemption Jun. 25, 2013