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Accrued Liabilities (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Changes in warranty and product maintenance contract liability    
Accrual at beginning of year $ 222 $ 224
Provision 67 63
Settlements (70) (65)
Adjustments to prior accrual estimates   (3)
Accrual at end of year $ 219 $ 219
Minimum
   
Accrued Liabilities    
Term of limited warranty and maintenance programs 1 year  
Maximum
   
Accrued Liabilities    
Term of limited warranty and maintenance programs 5 years