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Property (Tables) | 12 Months Ended
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Dec. 31, 2017
Property, Plant and Equipment, Net [Abstract] |
Property, Plant and Equipment |
| Estimated Useful Lives in Years |  | December 31, 2017 |  | December 31, 2016
Land |  |  | $ | 1,647 |  |  | $ | 1,587 |
Buildings and improvements | 5-40 |  | 7,471 |  |  | 6,217 |
Machinery and equipment | 3-27 |  | 23,915 |  |  | 21,613 |
Special tools | 1-13 |  | 21,113 |  |  | 19,359 |
Construction in progress |  |  | 6,188 |  |  | 4,493 |
Total property |  |  | 60,334 |  |  | 53,269 |
Less: accumulated depreciation |  |  | (24,081 | ) |  | (20,666 | )
Total property, net |  |  | $ | 36,253 |  |  | $ | 32,603 |
Depreciation Amortization and Impairment of Property Plant and Equipment | The amount of interest capitalized and excluded from Automotive interest expense related to Property, net was insignificant in the years ended December 31, 2017, 2016 and 2015.
| Years Ended December 31,
| 2017 |  | 2016 |  | 2015
Depreciation and amortization expense | $ | 4,966 |  |  | $ | 4,622 |  |  | $ | 3,904 |
Impairment charges | $ | 199 |  |  | $ | 68 |  |  | $ | 628 |
Capitalized software amortization expense(a) | $ | 459 |  |  | $ | 458 |  |  | $ | 374 |
__________
(a) | Included in depreciation and amortization expense.

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- Definition Tabular disclosure of the amount of depreciation, amortization and impairment of property, plant and equipment directly related to goods produced and sold and services rendered by an entity during the reporting period. + References No definition available. + Details
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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