Derivative Instruments and Fair Value Measurements (Details1) (Finance Group [Member], Fair Value, Measurements, Nonrecurring [Member], Unobservable Inputs (Level 3) [Member], USD $) In Millions	9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010
Finance Group [Member] | Fair Value, Measurements, Nonrecurring [Member] | Unobservable Inputs (Level 3) [Member]
Assets measured at fair value on a nonrecurring basis
Impaired finance receivables, Balance	$ 348	$ 525
Finance receivables held for sale, Balance	245	252
Other assets, Balance	115	126
Impaired finance receivables, Gain (Loss)	(73)	(130)
Finance receivables held for sale, Gain (Loss)	(22)	(17)
Other assets, Gain (Loss)	$ (26)	$ (38)