|
|
|
Balance at December 31, |
|
||||
|
|
|
2016 |
|
2015 |
|
||
|
|
|
(in millions) |
|
||||
|
Materials and supplies |
|
$ |
55 |
|
$ |
55 |
|
|
Finished goods |
|
3 |
|
3 |
|
||
|
|
|
|
|
|
|
||
|
Total |
|
$ |
58 |
|
$ |
58 |
|
|
|
|
|
|
|
|
|
|