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Incentive Stock Programs (Tables) | 6 Months Ended
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Jun. 30, 2021
Incentive Stock Programs |
Schedule of stock options outstanding and exercisable | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Outstanding |  | Exercisable
Number of shares |  |  | 30,091,814 | ​ |  | 23,273,096
Weighted average remaining life (years) |  |  | 6.0 | ​ |  | 5.2
Weighted average exercise price |  | $ | 62.45 | ​ | $ | 51.56
Aggregate intrinsic value (in millions) |  | $ | 1,631 | ​ | $ | 1,498

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