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EARNINGS PER SHARE AND DIVIDENDS (Tables) | 9 Months Ended
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Sep. 30, 2025
Earnings Per Share [Abstract] |
Reconciliation of Basic and Diluted Earnings Per Share | The following is a reconciliation of basic and diluted earnings per share:
| Three Months Ended |  | Nine Months Ended |
| September 30, |  | September 30, |  |  |  |  |
| 2025 |  | 2024 |  | 2025 |  | 2024 |  |  |  |  |
| (millions, except per share amounts) |
Basic and Diluted Earnings per Common Share |  |  |  |  |  |  |  |  |  |  |  |
Net Income Attributable to DT Midstream | $ | 115 |  |  | $ | 88 |  |  | $ | 330 |  |  | $ | 281 |  |  |  |  |  |
Average number of common shares outstanding — basic | 101.6 |  |  | 97.1 |  |  | 101.6 |  |  | 97.1 |  |  |  |  |  |
Incremental shares attributable to: |  |  |  |  |  |  |  |  |  |  |  |
Average dilutive restricted stock units and performance share awards | 0.9 |  |  | 0.9 |  |  | 0.9 |  |  | 0.7 |  |  |  |  |  |
Average number of common shares outstanding — diluted | 102.5 |  |  | 98.0 |  |  | 102.5 |  |  | 97.8 |  |  |  |  |  |
Basic Earnings per Common Share | $ | 1.14 |  |  | $ | 0.91 |  |  | $ | 3.25 |  |  | $ | 2.90 |  |  |  |  |  |
Diluted Earnings per Common Share | $ | 1.13 |  |  | $ | 0.90 |  |  | $ | 3.22 |  |  | $ | 2.87 |  |  |  |  |  |
Schedule of Cash Dividends Declared | We declared the following cash dividends:
Dividends Declared |  | Dividend Amount |  | Dividend Payment Date
(quarter ended) |  | (per-share) |  | (millions) |  |
2024 |  |  |  |  |  |
March 31 |  | $ | 0.735 |  |  | $ | 71 |  |  | April 2024
June 30 |  | $ | 0.735 |  |  | $ | 71 |  |  | July 2024
September 30 |  | $ | 0.735 |  |  | $ | 71 |  |  | October 2024
December 31 |  | $ | 0.735 |  |  | $ | 75 |  |  | January 2025
2025 |  |  |  |  |  |
March 31 |  | $ | 0.820 |  |  | $ | 83 |  |  | April 2025
June 30 |  | $ | 0.820 |  |  | $ | 83 |  |  | July 2025
September 30 |  | $ | 0.820 |  |  | $ | 83 |  |  | October 2025

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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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