Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended
Mar. 25, 2012
Dec. 25, 2011
Dec. 26, 2010
Stock repurchase program [Abstract]      
Shares repurchased and retired, shares   2,046,000 0
Shares repurchased and retired, value   $ 99 $ 0
Authorized dollar amount remaining available under stock repurchase program, net of put options outstanding   948  
Option Indexed to Issuer's Equity, Indexed Shares   11,800,000  
Maximum value, net of premiums received, of outstanding options indexed to issuers equity   511  
Premiums received from put option derivative instruments   75  
Put option contracts derivative liabilities at fair value   35  
Gain on put option derivatives recorded in net investment income   45 0
Dividends [Abstract]      
Dividends per share announced (in dollars per share) $ 0.215 $ 0.215 $ 0.190 [1]
Dividends charged to retained earnings   $ 368 $ 314
Dividends Payable, Date Declared, Day, Month and Year Jan. 10, 2012    
Dividends Payable, Date to be Paid, Day, Month and Year Mar. 23, 2012    
Dividends Payable, Date of Record, Day, Month and Year Mar. 02, 2012    
[1] As adjusted for discontinued operations (Note 8)