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EARNINGS PER SHARE EARNINGS PER SHARE (Notes) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | EARNINGS PER SHARE The following tables set forth the computation of basic and diluted EPS for the periods indicated:
|  | Year Ended December 31, 2020
|  | Income |  | Shares |  | Per Share Amount
|  | (Thousands, except per share amounts)
Basic EPS |  |  |  |  |  |
Net income available for common stock |  | $ | 611,709 |  |  | 431,105 |  |  | $ | 1.42 |
Diluted EPS |  |  |  |  |  |
Effect of dilutive securities |  | — |  |  | 677 |  |  |
Net income available for common stock and common stock equivalents |  | $ | 611,709 |  |  | 431,782 |  |  | $ | 1.42 |
|  | Year Ended December 31, 2019
|  | Income |  | Shares |  | Per Share Amount
|  | (Thousands, except per share amounts)
Basic EPS |  |  |  |  |  |
Net income available for common stock |  | $ | 1,277,477 |  |  | 413,560 |  |  | $ | 3.09 |
Diluted EPS |  |  |  |  |  |
Effect of dilutive securities |  | — |  |  | 1,884 |  |  |
Net income available for common stock and common stock equivalents |  | $ | 1,277,477 |  |  | 415,444 |  |  | $ | 3.07 |
|  | Year Ended December 31, 2018
|  | Income |  | Shares |  | Per Share Amount
|  | (Thousands, except per share amounts)
Basic EPS |  |  |  |  |  |
Net income attributable to ONEOK available for common stock |  | $ | 1,150,603 |  |  | 411,485 |  |  | $ | 2.80 |
Diluted EPS |  |  |  |  |  |
Effect of dilutive securities |  | — |  |  | 2,710 |  |  |
Net income attributable to ONEOK available for common stock and common stock equivalents |  | $ | 1,150,603 |  |  | 414,195 |  |  | $ | 2.78 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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