Accrued Liabilities, Other Liabilities and Deferred Income Taxes Summary of Activity for Policy, Product Warranty and Recall Campaigns Liabilities (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 7,204	$ 6,600	$ 6,789
Warranties issued and assumed in period	3,181	3,394	3,062
Payments	(3,063)	(3,393)	(3,740)
Adjustments to pre-existing warranties	123	539	565
Effect of foreign currency and other	(231)	64	(76)
Ending balance	$ 7,214	$ 7,204	$ 6,600