Derivative Instruments and Fair Value Measurements (Details 2) (Fair Value, Measurements, Nonrecurring, Finance group, Unobservable Inputs (Level 3), USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Dec. 28, 2013
Fair Value, Measurements, Nonrecurring | Finance group | Unobservable Inputs (Level 3)
Assets measured at fair value on a nonrecurring basis
Finance receivables held for sale, Balance	$ 61		$ 65
Impaired finance receivables, Balance	46		45
Other assets, balance	9		35
Finance receivables held for sale, Gain (Loss)	1	12
Impaired finance receivables, Gain (Loss)	(5)	(3)
Other assets, Gain (Loss)	$ (1)	$ (4)