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v3.22.1

Inventories | 3 Months Ended
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Mar. 31, 2022
Inventories |
Inventories | 4. Inventories Major classes of inventory at March 31, 2022, December 31, 2021 and March 31, 2021 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31, | ​ | March 31, | ​ | ​
​ |  | 2022 |  | 2021 |  | 2021 | ​ | ​
Finished goods | ​ | $ | 676 | ​ | $ | 659 | ​ | $ | 672 | ​ | ​
Raw materials | ​ |  | 121 | ​ |  | 119 | ​ |  | 119 | ​ | ​
Operating supplies | ​ |  | 40 | ​ |  | 38 | ​ |  | 36 | ​ | ​
​ | ​ | $ | 837 | ​ | $ | 816 | ​ | $ | 827 | ​ | ​
​

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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