Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Operating revenues	$ 4,971	$ 6,288	$ 13,154	$ 13,187
Fuel, purchased power costs, and delivery fees	(2,370)	(2,207)	(6,791)	(5,520)
Operating costs	(655)	(616)	(2,081)	(1,742)
Depreciation and amortization	(460)	(466)	(1,523)	(1,306)
Selling, general, and administrative expenses	(444)	(411)	(1,254)	(1,137)
Impairment of long-lived assets	(5)	0	(73)	0
Operating income	1,037	2,588	1,432	3,482
Other income, net	105	136	291	282
Interest expense and related charges	(286)	(332)	(908)	(743)
Impacts of Tax Receivable Agreement	0	0	0	(5)
Net income before income taxes	856	2,392	815	3,016
Income tax expense	(204)	(555)	(104)	(694)
Net income	652	1,837	711	2,322
Net (income) loss attributable to noncontrolling interest	0	51	0	(104)
Net income attributable to Vistra	652	1,888	711	2,218
Cumulative dividends attributable to preferred stock	(48)	(48)	(144)	(144)
Net income attributable to Vistra common stock	$ 604	$ 1,840	$ 567	$ 2,074
Weighted average shares of common stock outstanding:
Weighted average shares of common stock outstanding - basic (in shares)	338,749,454	342,969,916	339,313,294	346,315,125
Weighted average shares of common stock outstanding - diluted (in shares)	345,035,160	350,203,692	346,303,617	353,805,937
Net income per weighted average share of common stock outstanding:
Net income per weighted average share of common stock outstanding - basic (in dollars per share)	$ 1.78	$ 5.36	$ 1.67	$ 5.99
Net income per weighted average share of common stock outstanding - diluted (in dollars per share)	$ 1.75	$ 5.25	$ 1.64	$ 5.86