Product Guarantee (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013		Jul. 01, 2012
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning balance	$ 319		$ 293
Warranty expense	52		35
Payments	(29)		(35)
Adjustments	0	[1]	(8)	[1]
Ending balance	$ 342		$ 285

[1] Includes reclassifications.