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Earnings Per Share | 6 Months Ended
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Jun. 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 June 30, |  | Six months ended June 30,
Millions, except per share amounts | 2025 | 2024 |  | 2025 | 2024
Net income | $ | 1,876 |  | $ | 1,673 |  |  | $ | 3,502 |  | $ | 3,314 |
Weighted-average number of shares outstanding: |  |  |  |  |
Basic | 594.1 |  | 609.4 |  |  | 597.5 | 609.3
Dilutive effect of stock options | 0.2 |  | 0.4 |  |  | 0.3 | 0.5
Dilutive effect of retention shares and units | 0.5 |  | 0.5 |  |  | 0.6 | 0.5
Diluted | 594.8 |  | 610.3 |  |  | 598.4 | 610.3
Earnings per share - basic | $ | 3.16 |  | $ | 2.75 |  |  | $ | 5.86 |  | $ | 5.44 |
Earnings per share - diluted | $ | 3.15 |  | $ | 2.74 |  |  | $ | 5.85 |  | $ | 5.43 |
Stock options excluded as their inclusion would be anti-dilutive | 1.0 | 0.5 |  | 0.9 | 0.5

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