PROPERTY, PLANT AND EQUIPMENT, NET
PP&E is carried at historical cost, net of accumulated depreciation. The major classes of PP&E were as follows:
|
| | | | | | | |
December 31 | 2012 | | 2013 |
Machinery and equipment | $ | 3,966 |
| | $ | 4,156 |
|
Buildings and improvements | 2,442 |
| | 2,508 |
|
Land and improvements | 340 |
| | 337 |
|
Construction in process | 255 |
| | 247 |
|
Total PP&E | 7,003 |
| | 7,248 |
|
Accumulated depreciation | (3,600 | ) | | (3,833 | ) |
PP&E, net | $ | 3,403 |
| | $ | 3,415 |
|
We depreciate most of our assets using the straight-line method and the remainder using accelerated methods. Buildings and improvements are depreciated over periods of up to 50 years. Machinery and equipment are depreciated over periods of up to 30 years. Our government customers provide certain facilities and as such, we do not include these facilities above.
