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Operating, Selling and General Expense (Tables) | 12 Months Ended
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Dec. 31, 2023
Operating, Selling and General Expense |
Schedule of operating, selling and general expenses | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ |
($ millions) | ​ | 2023 | ​ | 2022 | ​
Employee and contract service costs |  | 8 458 |  | 8 037 | ​
Materials and equipment |  | 2 518 |  | 1 901 | ​
Commodities |  | 1 739 |  | 2 196 | ​
Travel, marketing and other(1) |  | 668 |  | 673 | ​
​ |  | 13 383 |  | 12 807 | ​
​
(1) | The company recorded a $275 million restructuring charge in the second quarter of 2023 that has been reported under travel, marketing and other.

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