Accumulated Other Comprehensive Income (Loss) (Details 2) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Other income (expense)		$ (5)	$ 0
Interest expense excluding Financial Products		(123)	(129)
Interest expense of Financial Products		(159)	(152)
Reclassifications before tax		289	365
Tax (provision) benefit		(90)	(92)
Reclassifications net of tax	[1]	192	271
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Reclassifications net of tax		(41)	(1)
Reclassification out of Accumulated Other Comprehensive Income | Foreign currency translation
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Other income (expense)		(2)	0
Tax (provision) benefit		0	0
Reclassifications net of tax		(2)	0
Reclassification out of Accumulated Other Comprehensive Income | Pension and other postretirement benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amortization of prior service credit (cost)		5	15
Tax (provision) benefit		(1)	(5)
Reclassifications net of tax		4	10
Reclassification out of Accumulated Other Comprehensive Income | Derivative financial instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Reclassifications before tax		(62)	(14)
Tax (provision) benefit		22	5
Reclassifications net of tax		(40)	(9)
Reclassification out of Accumulated Other Comprehensive Income | Derivative financial instruments | Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Other income (expense)		(61)	(10)
Reclassification out of Accumulated Other Comprehensive Income | Derivative financial instruments | Interest rate contracts | Machinery, Energy & Transportation
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Interest expense excluding Financial Products		(2)	(2)
Reclassification out of Accumulated Other Comprehensive Income | Derivative financial instruments | Interest rate contracts | Financial Products
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Interest expense of Financial Products		1	(2)
Reclassification out of Accumulated Other Comprehensive Income | Available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Other income (expense)		(4)	(3)
Tax (provision) benefit		1	1
Reclassifications net of tax		$ (3)	$ (2)

[1] 1 Profit attributable to common shareholders.