Commitments and Contingencies (Schedule of Product Warranty and Recall Reserves) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at January 1	$ 217	$ 189
Issuances/accruals during the period	344	427
Settlements made during the period	(361)	(408)
Other changes	(9)	9
Balance at December 31	191	217
Current portion	157	174
Non-current portion	34	43
Total	191	217
Product Recall [Member]
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at January 1	15	2
Issuances/accruals during the period	0	78
Settlements made during the period	(6)	(65)
Other changes	(9)	0
Balance at December 31	0	15
Current portion	0	15
Non-current portion	0	0
Total	0	15
Product Warranty [Member]
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at January 1	202	187
Issuances/accruals during the period	344	349
Settlements made during the period	(355)	(343)
Other changes	0	9
Balance at December 31	191	202
Current portion	157	159
Non-current portion	34	43
Total	$ 191	$ 202