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Product Guarantee (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 28, 2014
Sep. 29, 2013
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Beginning balance $ 354 $ 316
Warranty expense 108 84
Payments (54) (50)
Adjustments 6 (4)
Ending balance $ 414 $ 346