Financial Information by Business Segment - Schedule of Segment Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Operating segments information
Segment operating income	$ 1,134,038	$ 2,971	$ 1,630,288	$ 185,691
Unallocated amounts:
Corporate selling, general and administrative	81,586	67,207	173,050	140,260
Corporate other operating expenses	176,490	52,190	189,964	64,163
Income from investments	(67,174)	(172)	(93,636)	(2,432)
Other income	(2,616)	(19,431)	(3,239)	(19,636)
Loss on debt extinguishment	5,889	1,837	17,569	5,286
Interest expense, net	105,668	55,720	223,237	110,091
Income (loss) before income taxes	1,092,271	(34,983)	1,486,357	92,382
MVP Joint Venture | Transmission
Unallocated amounts:
Equity earnings from Company's investments	41,600		66,000
Operating Segments
Operating segments information
Segment operating income	1,302,571	46,859	1,828,708	241,399
Unallocated amounts:
Corporate selling, general and administrative	67,736	67,207	141,222	140,260
Corporate other operating expenses	28,248	10,844	35,093	13,444
Operating Segments | Transmission
Operating segments information
Segment operating income	90,056		193,206
Unallocated amounts:
Corporate selling, general and administrative	8,107		17,526
Corporate other operating expenses	0		(536)
Intersegment eliminations and other
Operating segments information
Segment operating income	687	0	1,389	0
Unallocated amounts
Operating segments information
Segment operating income	(168,533)	(43,888)	(198,420)	(55,708)
Unallocated revenue	(35)	(1)	(111)	(13)
Unallocated amounts:
Corporate selling, general and administrative	13,850	0	31,828	0
Corporate depreciation and amortization	5,789	2,543	10,443	5,002
Corporate other operating expenses	148,242	41,346	154,871	50,719
Income from investments	(67,174)	(172)	(93,636)	(2,432)
Other income	(2,616)	(19,431)	(3,239)	(19,636)
Loss on debt extinguishment	5,889	1,837	17,569	5,286
Interest expense, net	$ 105,668	$ 55,720	$ 223,237	$ 110,091