Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) (USD $)
 3 Months Ended 6 Months Ended 0 Months Ended
Mar. 31, 2013
Dec. 30, 2012
Mar. 25, 2012
Dec. 25, 2011
Mar. 31, 2013
Mar. 25, 2012
Apr. 09, 2013
Subsequent Event [Member]
Stock repurchase program [Abstract]              
Shares repurchased and retired, shares         4,295,000 2,046,000  
Shares repurchased and retired, amount, before commissions         $ 250,000,000 $ 99,000,000  
Authorized dollar amount for repurchase of common stock under current stock repurchase program         5,000,000,000    
Authorized dollar amount for repurchase of common stock under prior stock repurchase program         4,000,000,000    
Authorized dollar amount remaining available under prior stock repurchase program         2,500,000,000    
Authorized dollar amount remaining available under current stock repurchase program         5,000,000,000    
Dividends [Abstract]              
Percentage increase in common stock dividends per share announced 40.00%            
Cash dividends announced, per share $ 0.250 $ 0.250 $ 0.215 $ 0.215 $ 0.500 $ 0.430  
Amount of future common stock dividends per share $ 0.35            
Subsequent Event [Line Items]              
Cash dividends payable, per share             $ 0.35
Cash dividends payable, date payable             Jun. 26, 2013
Cash dividends payable, date of record             Jun. 05, 2013
Dividends charged to retained earnings $ 439,000,000 $ 435,000,000 $ 377,000,000 $ 368,000,000 $ 874,000,000 $ 745,000,000