Accumulated Other Comprehensive Income (Loss) (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Other income (expense)	$ 54		$ 29
Interest expense of Financial Products	(160)		(189)
Tax (provision) benefit	(418)		(246)
Reclassifications net of tax	922	[1]	880	[1]
Reclassification out of Accumulated Other Comprehensive Income
Reclassifications net of tax	(65)		(131)
Reclassification out of Accumulated Other Comprehensive Income | Pension and other postretirement benefits
Amortization of actuarial gain (loss)	(130)		(196)
Amortization of prior service credit (cost)	9		14
Amortization of transition asset (obligation)	0		(1)
Reclassifications before tax	(121)		(183)
Tax (provision) benefit	41		62
Reclassifications net of tax	(80)		(121)
Reclassification out of Accumulated Other Comprehensive Income | Derivative financial instruments
Reclassifications before tax	8		(18)
Tax (provision) benefit	(3)		7
Reclassifications net of tax	5		(11)
Reclassification out of Accumulated Other Comprehensive Income | Derivative financial instruments | Foreign exchange contracts
Other income (expense)	10		(17)
Reclassification out of Accumulated Other Comprehensive Income | Derivative financial instruments | Interest rate contracts | Machinery, Energy & Transportation
Other income (expense)	(1)		0
Reclassification out of Accumulated Other Comprehensive Income | Derivative financial instruments | Interest rate contracts | Financial Products
Interest expense of Financial Products	(1)		(1)
Reclassification out of Accumulated Other Comprehensive Income | Available-for-sale securities
Other income (expense)	14		1
Tax (provision) benefit	(4)		0
Reclassifications net of tax	$ 10		$ 1

[1] 1 Profit attributable to common stockholders.