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Segment and Related Information | 12 Months Ended
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Dec. 31, 2023
Segment Reporting [Abstract] |
Segment and Related Information | SEGMENT AND RELATED INFORMATION We set strategic goals, allocate resources, and evaluate performance based on the following structure: The Pipeline segment owns and operates interstate and intrastate natural gas pipelines, storage systems, and natural gas gathering lateral pipelines. The Pipeline segment also has interests in equity method investees that own and operate interstate natural gas pipelines. The segment is engaged in the transportation and storage of natural gas for intermediate and end user customers. During the three months ended March 31, 2023, we completed the conversion of the Michigan System from gathering to dry gas transmission service and began providing services under a new long-term dry gas transmission contract. For the year ended December 31, 2023, the Michigan System financial results are presented in the Pipeline segment. The prior years' comparative activity was for gathering services and therefore was not revised from presentation in the Gathering segment. The Gathering segment owns and operates gas gathering systems. The segment is engaged in collecting natural gas from points at or near customers’ wells for delivery to plants for treating, to gathering pipelines for further gathering, or to pipelines for transportation, as well as associated ancillary services, including compression, dehydration, gas treatment, water impoundment, water transportation, water disposal, and sand mining. Inter-segment billing for goods and services exchanged between segments is based upon contracted prices of the provider. Inter-segment billings were not significant for the years ended December 31, 2023, 2022 and 2021. Financial data for our business segments follows:
| Year Ended December 31, 2023
| Pipeline |  | Gathering |  | Eliminations |  | Total
| (millions)
Operating revenues | $ | 377 |  |  | $ | 545 |  |  | $ | — |  |  | $ | 922 |
Operation and maintenance | 55 |  |  | 190 |  |  | — |  |  | 245 |
Depreciation and amortization | 69 |  |  | 113 |  |  | — |  |  | 182 |
Taxes other than income | 15 |  |  | 13 |  |  | — |  |  | 28 |
Asset (gains) losses and impairments, net | (4) |  |  | — |  |  | — |  |  | (4) |
Operating Income | 242 |  |  | 229 |  |  | — |  |  | 471 |
Interest expense | 55 |  |  | 95 |  |  | — |  |  | 150 |
Interest income | (1) |  |  | — |  |  | — |  |  | (1) |
Earnings from equity method investees | (177) |  |  | — |  |  | — |  |  | (177) |
Other (income) and expense | — |  |  | (1) |  |  | — |  |  | (1) |
Income Tax Expense | 75 |  |  | 29 |  |  | — |  |  | 104 |
Net Income | 290 |  |  | 106 |  |  | — |  |  | 396 |
Less: Net Income Attributable to Noncontrolling Interests | 12 |  |  | — |  |  | — |  |  | 12 |
Net Income Attributable to DT Midstream | $ | 278 |  |  | $ | 106 |  |  | $ | — |  |  | $ | 384 |
Capital expenditures | $ | 255 |  |  | $ | 517 |  |  | $ | — |  |  | $ | 772 |
| December 31, 2023
Investments in equity method investees | $ | 1,762 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,762 |
Goodwill | 53 |  |  | 420 |  |  | — |  |  | 473 |
Total Assets | $ | 4,439 |  |  | $ | 4,543 |  |  | $ | — |  |  | $ | 8,982 |
| Year Ended December 31, 2022
| Pipeline |  | Gathering |  | Eliminations |  | Total
| (millions)
Operating revenues | $ | 339 |  |  | $ | 581 |  |  | $ | — |  |  | $ | 920 |
Operation and maintenance | 54 |  |  | 213 |  |  | — |  |  | 267 |
Depreciation and amortization | 63 |  |  | 107 |  |  | — |  |  | 170 |
Taxes other than income | 14 |  |  | 14 |  |  | — |  |  | 28 |
Asset (gains) losses and impairments, net | (6) |  |  | (17) |  |  | — |  |  | (23) |
Operating Income | 214 |  |  | 264 |  |  | — |  |  | 478 |
Interest expense | 57 |  |  | 80 |  |  | — |  |  | 137 |
Interest income | (1) |  |  | (2) |  |  | — |  |  | (3) |
Earnings from equity method investees | (150) |  |  | — |  |  | — |  |  | (150) |
Loss from financing activities | 6 |  |  | 7 |  |  | — |  |  | 13 |
Other (income) and expense | — |  |  | (1) |  |  | — |  |  | (1) |
Income Tax Expense | 62 |  |  | 38 |  |  | — |  |  | 100 |
Net Income | 240 |  |  | 142 |  |  | — |  |  | 382 |
Less: Net Income Attributable to Noncontrolling Interests | 12 |  |  | — |  |  | — |  |  | 12 |
Net Income Attributable to DT Midstream | $ | 228 |  |  | $ | 142 |  |  | $ | — |  |  | $ | 370 |
Capital expenditures and acquisitions | $ | 638 |  |  | $ | 252 |  |  | $ | — |  |  | $ | 890 |
| December 31, 2022
Investments in equity method investees | $ | 2,200 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,200 |
Goodwill | 53 |  |  | 420 |  |  | — |  |  | 473 |
Total Assets | $ | 4,625 |  |  | $ | 4,208 |  |  | $ | — |  |  | $ | 8,833 |
| Year Ended December 31, 2021
| Pipeline |  | Gathering |  | Eliminations |  | Total
| (millions)
Operating revenues | $ | 307 |  |  | $ | 534 |  |  | $ | (1) |  |  | $ | 840 |
Operation and maintenance | 59 |  |  | 173 |  |  | (1) |  |  | 231 |
Depreciation and amortization | 63 |  |  | 103 |  |  | — |  |  | 166 |
Taxes other than income | 13 |  |  | 11 |  |  | — |  |  | 24 |
Asset (gains) losses and impairments, net | — |  |  | 17 |  |  | — |  |  | 17 |
Operating Income | 172 |  |  | 230 |  |  | — |  |  | 402 |
Interest expense | 51 |  |  | 61 |  |  | — |  |  | 112 |
Interest income | (1) |  |  | (3) |  |  | — |  |  | (4) |
Earnings from equity method investees | (126) |  |  | — |  |  | — |  |  | (126) |
Other (income) and expense | (3) |  |  | 1 |  |  | — |  |  | (2) |
Income Tax Expense | 62 |  |  | 42 |  |  | — |  |  | 104 |
Net Income | 189 |  |  | 129 |  |  | — |  |  | 318 |
Less: Net Income Attributable to Noncontrolling Interests | 11 |  |  | — |  |  | — |  |  | 11 |
Net Income Attributable to DT Midstream | $ | 178 |  |  | $ | 129 |  |  | $ | — |  |  | $ | 307 |
Capital expenditures | $ | 20 |  |  | $ | 120 |  |  | $ | — |  |  | $ | 140 |
| December 31, 2021
Investments in equity method investees | $ | 1,691 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,691 |
Goodwill | 53 |  |  | 420 |  |  | — |  |  | 473 |
Total Assets | $ | 4,165 |  |  | $ | 4,001 |  |  | $ | — |  |  | $ | 8,166 |

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-15 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-31 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//280/tableOfContent Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 26 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-26 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-34 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 + Details
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