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EARNINGS PER SHARE EARNINGS PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Share | The following tables set forth the computation of basic and diluted EPS for the periods indicated:
| Three Months Ended September 30, 2018
| Income |  | Shares |  | Per Share Amount
| (Thousands, except per share amounts)
Basic EPS |  |  |  |  |
Net income attributable to ONEOK available for common stock | $ | 312,984 |  |  | 412,117 |  |  | $ | 0.76 |
Diluted EPS |  |  |  |  |  |  |
Effect of dilutive securities | — |  |  | 2,730 |  |  |  |
Net income attributable to ONEOK available for common stock and common stock equivalents | $ | 312,984 |  |  | 414,847 |  |  | $ | 0.75 |
| Three Months Ended September 30, 2017
| Income |  | Shares |  | Per Share Amount
| (Thousands, except per share amounts)
Basic EPS |  |  |  |  |
Net income attributable to ONEOK available for common stock | $ | 165,466 |  |  | 380,907 |  |  | $ | 0.43 |
Diluted EPS |  |  |  |  |  |  |
Effect of dilutive securities | — |  |  | 2,512 |  |  |  |
Net income attributable to ONEOK available for common stock and common stock equivalents | $ | 165,466 |  |  | 383,419 |  |  | $ | 0.43 |
| Nine Months Ended September 30, 2018
| Income |  | Shares |  | Per Share Amount
| (Thousands, except per share amounts)
Basic EPS |  |  |  |  |
Net income attributable to ONEOK available for common stock | $ | 857,990 |  |  | 411,400 |  |  | $ | 2.09 |
Diluted EPS |  |  |  |  |  |  |
Effect of dilutive securities | — |  |  | 2,635 |  |  |  |
Net income attributable to ONEOK available for common stock and common stock equivalents | $ | 857,990 |  |  | 414,035 |  |  | $ | 2.07 |
| Nine Months Ended September 30, 2017
| Income |  | Shares |  | Per Share Amount
| (Thousands, except per share amounts)
Basic EPS |  |  |  |  |
Net income attributable to ONEOK available for common stock | $ | 324,303 |  |  | 268,108 |  |  | $ | 1.21 |
Diluted EPS |  |  |  |  |  |  |
Effect of dilutive securities | — |  |  | 2,241 |  |  |  |
Net income attributable to ONEOK available for common stock and common stock equivalents | $ | 324,303 |  |  | 270,349 |  |  | $ | 1.20 |

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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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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