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Earnings Per Share and Dividends (Tables) | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Reconciliation of Basic and Diluted Earnings Per Share | The following is a reconciliation of basic and diluted earnings per share:
|  |  |  |  | Year Ended December 31,
|  |  |  |  |  |  |  |  |  |  | 2023 |  | 2022 |  | 2021
|  |  | (millions, except per share amounts)
Basic and Diluted Earnings per Common Share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income Attributable to DT Midstream |  |  |  |  |  |  |  |  |  |  | $ | 384 |  |  | $ | 370 |  |  | $ | 307 |
Average number of common shares outstanding — basic |  |  |  |  |  |  |  |  |  |  | 96.9 |  | 96.7 |  | 96.7
Incremental shares attributable to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average dilutive restricted stock units and performance share awards |  |  |  |  |  |  |  |  |  |  | 0.6 |  |  | 0.5 |  |  | 0.2 |
Average number of common shares outstanding — diluted |  |  |  |  |  |  |  |  |  |  | 97.5 |  | 97.2 |  | 96.9
Basic Earnings per Common Share |  |  |  |  |  |  |  |  |  |  | $ | 3.97 |  |  | $ | 3.83 |  |  | $ | 3.17 |
Diluted Earnings per Common Share |  |  |  |  |  |  |  |  |  |  | $ | 3.94 |  |  | $ | 3.81 |  |  | $ | 3.16 |
Schedule of Cash Dividends Declared | We declared the following cash dividends:
Dividends Declared |  | Dividend Amount |  | Dividend Payment Date
(quarter ended) |  | (per-share) |  | (millions) |  |
2021 |  |  |  |  |  |
September 30 |  | $ | 0.60 |  |  | $ | 58 |  |  | October 2021
December 31 |  | $ | 0.60 |  |  | $ | 58 |  |  | January 2022
2022 |  |  |  |  |  |
March 31 |  | $ | 0.64 |  |  | $ | 62 |  |  | April 2022
June 30 |  | $ | 0.64 |  |  | $ | 62 |  |  | July 2022
September 30 |  | $ | 0.64 |  |  | $ | 62 |  |  | October 2022
December 31 |  | $ | 0.64 |  |  | $ | 62 |  |  | January 2023
2023 |  |  |  |  |  |
March 31 |  | $ | 0.69 |  |  | $ | 67 |  |  | April 2023
June 30 |  | $ | 0.69 |  |  | $ | 67 |  |  | July 2023
September 30 |  | $ | 0.69 |  |  | $ | 67 |  |  | October 2023
December 31 |  | $ | 0.69 |  |  | $ | 67 |  |  | January 2024

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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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