Derivative Instruments and Fair Value Measurements (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011
Assets measured at fair value on a nonrecurring basis
Number of loan categories for cash flow models based on the entity's qualitative assumptions	3
Average resolution period for loans held for sale that have defaulted	24 months
Minimum
Assets measured at fair value on a nonrecurring basis
Loan Restructured and Resolved for Second Category Period	1 year
Maximum
Assets measured at fair value on a nonrecurring basis
Loan Restructured and Resolved for Second Category Period	4 years
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	$ 244	$ 180
Impaired finance receivables, Balance	110	407
Repossessed assets and properties	138	91
Finance receivables held for sale, Gain (Loss)	44	(14)
Impaired finance receivables, Gain (Loss)	(7)	(50)
Repossessed assets and properties, Gain (Loss)	$ (32)	$ (18)