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Earnings Per Share | 9 Months Ended
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Sep. 30, 2025
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share The following table provides a reconciliation between basic and diluted earnings per share:
| Three months ended September 30, |  | Nine months ended September 30,
Millions, except per share amounts | 2025 | 2024 |  | 2025 | 2024
Net income | $ | 1,788 |  | $ | 1,671 |  |  | $ | 5,290 |  | $ | 4,985 |
Weighted-average number of shares outstanding: |  |  |  |  |
Basic | 592.4 |  | 607.6 |  |  | 595.8 | 608.7
Dilutive effect of stock options | 0.2 |  | 0.4 |  |  | 0.3 | 0.4
Dilutive effect of retention shares and units | 0.6 |  | 0.6 |  |  | 0.6 | 0.6
Diluted | 593.2 |  | 608.6 |  |  | 596.7 | 609.7
Earnings per share - basic | $ | 3.02 |  | $ | 2.75 |  |  | $ | 8.88 |  | $ | 8.19 |
Earnings per share - diluted | $ | 3.01 |  | $ | 2.75 |  |  | $ | 8.87 |  | $ | 8.18 |
Stock options excluded as their inclusion would be anti-dilutive | 1.0 | 0.6 |  | 0.9 | 0.6

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