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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2025
Earnings Per Share [Abstract] |
Schedule of Computation of Basic and Diluted EPS | The following tables set forth the computation of basic and diluted EPS for the periods indicated:
| Three Months Ended June 30, 2025
| Income |  | Shares |  | Per Share Amount
| (Millions, except per share amounts)
Basic EPS |  |  |  |  |
Net income attributable to ONEOK available for common stock | $ | 841 |  |  | 627.2 |  |  | $ | 1.34 |
Diluted EPS |  |  |  |  |
Effect of dilutive securities | — |  |  | 0.9 |  |  |
Net income attributable to ONEOK available for common stock and common stock equivalents | $ | 841 |  |  | 628.1 |  |  | $ | 1.34 |
| Three Months Ended June 30, 2024
| Income |  | Shares |  | Per Share Amount
| (Millions, except per share amounts)
Basic EPS |  |  |  |  |
Net income available for common stock | $ | 780 |  |  | 584.6 |  |  | $ | 1.33 |
Diluted EPS |  |  |  |  |
Effect of dilutive securities | — |  |  | 1.2 |  |  |
Net income available for common stock and common stock equivalents | $ | 780 |  |  | 585.8 |  |  | $ | 1.33 |
| Six Months Ended June 30, 2025
| Income |  | Shares |  | Per Share Amount
| (Millions, except per share amounts)
Basic EPS |  |  |  |  |
Net income attributable to ONEOK available for common stock | $ | 1,477 |  |  | 619.3 |  |  | $ | 2.38 |
Diluted EPS |  |  |  |  |
Effect of dilutive securities | — |  |  | 1.0 |  |  |
Net income attributable to ONEOK available for common stock and common stock equivalents | $ | 1,477 |  |  | 620.3 |  |  | $ | 2.38 |
| Six Months Ended June 30, 2024
| Income |  | Shares |  | Per Share Amount
| (Millions, except per share amounts)
Basic EPS |  |  |  |  |
Net income available for common stock | $ | 1,419 |  |  | 584.4 |  |  | $ | 2.43 |
Diluted EPS |  |  |  |  |
Effect of dilutive securities | — |  |  | 1.3 |  |  |
Net income available for common stock and common stock equivalents | $ | 1,419 |  |  | 585.7 |  |  | $ | 2.42 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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