v3.26.1
Financial Information by Business Segment - Schedule of Segment Operating Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Total segment operating income $ 394,038 $ 1,134,038 $ 2,429,998 $ 1,630,288
Unallocated amounts:        
Corporate selling, general and administrative 106,438 81,586 202,189 173,050
Corporate other operating expenses 64,510 177,763 82,560 192,288
Income from investments (44,732) (67,174) (122,241) (93,636)
Other income (3,404) (2,616) (3,522) (3,239)
Loss on debt extinguishment 341 5,889 29,869 17,569
Interest expense, net 75,452 105,668 172,229 223,237
Income before income taxes 366,381 1,092,271 2,353,663 1,486,357
MVP Joint Venture | Transmission        
Unallocated amounts:        
Equity earnings from Company's investments 45,000 41,600 101,200 66,000
Operating Segments        
Segment Reporting [Line Items]        
Total segment operating income 419,126 1,302,571 2,479,692 1,828,708
Unallocated amounts:        
Corporate selling, general and administrative 91,741 67,736 173,213 141,222
Corporate other operating expenses 60,392 29,521 74,381 37,417
Operating Segments | Transmission        
Segment Reporting [Line Items]        
Total segment operating income 93,003 90,056 209,025 193,206
Unallocated amounts:        
Corporate selling, general and administrative 8,361 8,107 16,039 17,526
Corporate other operating expenses 2,250 0 2,250 (536)
Intersegment eliminations and other        
Segment Reporting [Line Items]        
Total segment operating income 0 687 0 1,389
Unallocated amounts        
Segment Reporting [Line Items]        
Total segment operating income (25,088) (168,533) (49,694) (198,420)
Unallocated amounts:        
Other revenues (4) (35) (14) (111)
Corporate selling, general and administrative 14,697 13,850 28,976 31,828
Corporate depreciation and amortization 6,285 5,789 12,561 10,443
Corporate other operating expenses 4,118 148,242 8,179 154,871
Income from investments (44,732) (67,174) (122,241) (93,636)
Other income (3,404) (2,616) (3,522) (3,239)
Loss on debt extinguishment 341 5,889 29,869 17,569
Interest expense, net $ 75,452 $ 105,668 $ 172,229 $ 223,237