Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 13,514		$ 13,514		$ 12,566
Less: Accumulated depreciation and amortization	(3,848)		(3,848)		(3,611)
Property, plant and equipment, net	9,666		9,666		8,955
Depreciation and amortization expense related to property, plant and equipment	186	$ 175	368	$ 342
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	656		656		489
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,507		$ 2,507		2,353
Buildings and improvements | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (in years)			4 years
Buildings and improvements | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (in years)			40 years
Machinery, equipment and furniture
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,853		$ 5,853		5,594
Machinery, equipment and furniture | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (in years)			1 year
Machinery, equipment and furniture | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (in years)			40 years
Assets leased to others
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,844		$ 3,844		3,546
Less: Accumulated depreciation and amortization	(1,004)		$ (1,004)		(957)
Assets leased to others | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (in years)			15 years
Assets leased to others | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (in years)			39 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	654		$ 654		584
Railcars [Member] | Assets leased to others
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,400		3,400		3,100
Real estate properties [Member] | Assets leased to others
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 437		$ 437		$ 450