v3.26.1
SEGMENT INFORMATION (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting      
Operating revenues $ 473 $ 440  
Depreciation and amortization 91 84  
Interest expense, net 93 89  
Other Segment Items 112 102  
Income before income taxes 177 165  
INCOME TAX PROVISION 40 38  
Subsidiary net earnings 0 0  
Net income 137 127  
Expenditures for property, plant and equipment 398 354  
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization 13,521   $ 13,196
Goodwill 950   950
Assets 15,205   14,834
Regulated Operating Subsidiaries | Regulated Operating Subsidiaries      
Segment Reporting      
Operating revenues 484 449  
Depreciation and amortization 91 84  
Interest expense, net 48 45  
Other Segment Items 108 104  
Income before income taxes 237 216  
INCOME TAX PROVISION 57 52  
Subsidiary net earnings 0 0  
Net income 180 164  
Expenditures for property, plant and equipment 380 339  
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization 13,513   13,189
Goodwill 950   950
Assets 15,056   14,680
ITC Holdings and Other      
Segment Reporting      
Operating revenues 0 0  
Depreciation and amortization 0 0  
Interest expense, net 45 44  
Other Segment Items 15 7  
Loss before Income Taxes, Noncontrolling Interest (60) (51)  
INCOME TAX PROVISION (17) (14)  
Subsidiary net earnings 180 164  
Net income 137 127  
Expenditures for property, plant and equipment 0 0  
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization 8   7
Goodwill 0   0
Assets 7,954   7,761
Reconciliations/Eliminations      
Segment Reporting      
Operating revenues (11) (9)  
Depreciation and amortization 0 0  
Interest expense, net 0 0  
Other Segment Items (11) (9)  
Income before income taxes 0 0  
INCOME TAX PROVISION 0 0  
Subsidiary net earnings (180) (164)  
Net income (180) (164)  
Expenditures for property, plant and equipment 18 $ 15  
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization 0   0
Goodwill 0   0
Assets $ (7,805)   $ (7,607)