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
	Apr. 04, 2015	Mar. 29, 2014	Jan. 03, 2015
Fair Value, Measurements, Nonrecurring | Finance group | Unobservable Inputs (Level 3)
Assets measured at fair value on a nonrecurring basis
Impaired finance receivables, Balance	$ 52		$ 49
Impaired finance receivables, (gain) loss	$ 3	$ 5