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Share Based Compensation (Details) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Y
Jan. 01, 2011
Y
Jan. 02, 2010
Y
Compensation expense recorded in net income for share based compensation plans      
Compensation expense $ 50 $ 85 $ 83
Income tax benefit (18) (32) (30)
Total net compensation cost included in net income $ 32 $ 53 $ 53
Weighted average assumptions used in Black Scholes      
Dividend yield 0.30% 0.40% 1.40%
Expected Volatility 38.00% 37.00% 50.00%
Risk free interest rate 2.40% 2.60% 2.00%
Expected term (in years) 5.5 5.5 5.0
Stock option activity under the plan      
Outstanding at the beginning of year, number of stock options 6,926    
Weighted Average Exercise Price, Beginning of Period $ 28.15    
Grants in periods, number of options 2,995    
Granted in Period, Weighted Average Exercise Price $ 25.84    
Exercise of stock options (177) (336) (10)
Exercises in Period, Weighted Average Exercise Price $ 15.35    
Canceled, expired or forfeited in period, number of options (884)    
Forfeitures and Expirations in Period, Weighted Average Exercise Price $ 27.94    
Exercisable options, number 5,091    
Exercisable, Weighted Average Exercise Price $ 30.14    
Outstanding at the end of year, number of stock options 8,860 6,926  
Weighted Average Exercise Price, End of Period $ 27.68 $ 28.15