Commitments and Contingencies (Schedule of Product Warranty and Recall Reserves) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at January 1	$ 191	$ 217
Issuances/accruals during the period	70	84
Settlements made during the period	(79)	(91)
Other changes	2	(7)
Balance at March 31	184	203
Current portion	150	160
Non-current portion	34	43
Total	$ 184	$ 203