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Asset Impairments and Unusual Items (Tables) | 12 Months Ended
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Dec. 31, 2021
Asset Impairments and Unusual Items |
Summary of the major components of (gain) loss from divestitures, asset impairments and unusual items, net | The following table summarizes the major components of (gain) loss from divestitures, asset impairments and unusual items, net for the year ended December 31 (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019
Gain from divestitures, net | ​ | $ | (44) | ​ | $ | (33) | ​ | $ | —
Asset impairments | ​ |  | 8 | ​ |  | 68 | ​ |  | 42
Other | ​ |  | 20 | ​ |  | — | ​ |  | —
​ | ​ | $ | (16) | ​ | $ | 35 | ​ | $ | 42

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