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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

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