The cost and accumulated depreciation of property, plant and equipment were as follows (dollars in millions):
|
|
|
December 31, |
|
||||
|
|
|
2016 |
|
2015 |
|
||
|
Land |
|
$ |
229 |
|
$ |
208 |
|
|
Buildings |
|
|
822 |
|
|
793 |
|
|
Plant and equipment |
|
|
7,244 |
|
|
6,981 |
|
|
Construction in progress |
|
|
483 |
|
|
935 |
|
|
|
|
|
|
|
|
|
|
|
Total |
|
|
8,778 |
|
|
8,917 |
|
|
Less accumulated depreciation |
|
|
(4,566 |
) |
|
(4,471 |
) |
|
|
|
|
|
|
|
|
|
|
Net |
|
$ |
4,212 |
|
$ |
4,446 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|