v3.26.1
SEGMENT AND RELATED INFORMATION (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Segment Reporting [Line Items]          
Number of operating segments | segment     2    
Number of reportable segments | segment     2    
Revenues          
Operating revenues $ 343 $ 309 $ 679 $ 612  
Operating Expenses          
Operation and maintenance 90 80 175 158  
Depreciation and amortization 68 63 137 126  
Taxes other than income 12 11 27 25  
Asset losses and impairments, net 0 0 1 0  
Other (Income) and Deductions          
Interest expense 42 40 82 80  
Interest income (1) 0 (2) (1)  
Earnings from equity method investees (33) (30) (76) (67)  
Gain from financing activities (1) 0 (1) 0  
Other income (3) 0 (3) 0  
Income Tax Expense 53 34 89 69  
Less: Net Income Attributable to Noncontrolling Interests 4 4 8 7  
Net Income Attributable to DT Midstream 112 107 242 215  
Capital expenditures 105 81 183 152  
Investments in equity method investees 1,243 1,253 1,243 1,253 $ 1,253
Consolidated assets 10,207 [1] 10,080 10,207 [1] 10,080 $ 10,080 [1]
Operating segments          
Revenues          
Operating revenues 351 309 692 612  
Operating Expenses          
Operation and maintenance 98 80 188 158  
Depreciation and amortization 68 63 137 126  
Taxes other than income 12 11 27 25  
Asset losses and impairments, net     1    
Other (Income) and Deductions          
Interest expense 42 40 82 80  
Interest income (1)   (2) (1)  
Earnings from equity method investees (33) (30) (76) (67)  
Gain from financing activities (1)   (1)    
Other income (3)   (3)    
Income Tax Expense 53 34 89 69  
Less: Net Income Attributable to Noncontrolling Interests 4 4 8 7  
Net Income Attributable to DT Midstream 112 107 242 215  
Capital expenditures 105 81 183 152  
Investments in equity method investees 1,243 1,253 1,243 1,253  
Consolidated assets 10,207 10,080 10,207 10,080  
Operating segments | Pipeline          
Revenues          
Operating revenues 183 176 368 345  
Operating Expenses          
Operation and maintenance 39 34 74 66  
Depreciation and amortization 28 28 57 56  
Taxes other than income 8 7 17 16  
Asset losses and impairments, net     0    
Other (Income) and Deductions          
Interest expense 14 11 28 24  
Interest income 0   (1) (1)  
Earnings from equity method investees (33) (30) (76) (67)  
Gain from financing activities (1)   (1)    
Other income (3)        
Income Tax Expense 41 29 71 59  
Less: Net Income Attributable to Noncontrolling Interests 4 4 8 7  
Net Income Attributable to DT Midstream 86 93 194 185  
Capital expenditures 56 20 90 44  
Investments in equity method investees 1,243 1,253 1,243 1,253  
Consolidated assets 5,393 5,297 5,393 5,297  
Operating segments | Gathering          
Revenues          
Operating revenues 168 133 324 267  
Operating Expenses          
Operation and maintenance 59 46 114 92  
Depreciation and amortization 40 35 80 70  
Taxes other than income 4 4 10 9  
Asset losses and impairments, net     1    
Other (Income) and Deductions          
Interest expense 28 29 54 56  
Interest income (1)   (1) 0  
Earnings from equity method investees 0 0 0 0  
Gain from financing activities 0   0    
Other income 0   0    
Income Tax Expense 12 5 18 10  
Less: Net Income Attributable to Noncontrolling Interests 0 0 0 0  
Net Income Attributable to DT Midstream 26 14 48 30  
Capital expenditures 49 61 93 108  
Investments in equity method investees 0 0 0 0  
Consolidated assets 4,814 4,783 4,814 4,783  
Eliminations          
Revenues          
Operating revenues (8) 0 (13) 0  
Operating Expenses          
Operation and maintenance (8) 0 (13) 0  
Depreciation and amortization 0 0 0 0  
Taxes other than income 0 0 0 0  
Asset losses and impairments, net        
Other (Income) and Deductions          
Interest expense 0 0 0 0  
Interest income 0   0 0  
Earnings from equity method investees 0 0 0 0  
Gain from financing activities 0   0    
Other income 0   0    
Income Tax Expense 0 0 0 0  
Less: Net Income Attributable to Noncontrolling Interests 0 0 0 0  
Net Income Attributable to DT Midstream 0 0 0 0  
Capital expenditures 0 0 0 0  
Investments in equity method investees 0 0 0 0  
Consolidated assets $ 0 $ 0 $ 0 $ 0  
[1]
(a) Our consolidated assets include $932 million and $943 million at June 30, 2026 and December 31, 2025, respectively, of certain assets that can be used only to settle obligations of the VIE. See Note 1, "Description of the Business and Basis of Presentation," to the Consolidated Financial Statements.