Commitments and Contingencies (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Affiliated Entity [Member]	Dec. 31, 2011 Affiliated Entity [Member]
Guarantees [Abstract]
Maximum potential payments			$ 416,000,000	$ 444,000,000
Carrying value of recorded liabilities related to guarantees			27,000,000	31,000,000
Loss Contingency [Abstract]
Loss contingency estimate	2,300,000,000
Warranty [Abstract]
Product warranty reserve, beginning balance	3,915,000,000	3,855,000,000
Payments made during the period	(1,103,000,000)	(1,557,000,000)
Changes in accrual related to warranties issued during the period	1,084,000,000	1,026,000,000
Changes in accrual related to pre-existing warranties	43,000,000	298,000,000
Foreign currency translation and other	(13,000,000)	97,000,000
Product warranty reserve, ending balance	$ 3,926,000,000	$ 3,719,000,000