Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 652	$ 1,837	$ 711	$ 2,322
Other comprehensive income, net of tax effects:
Effects related to pension and other retirement benefit obligations (net of tax expense of $—, $—, $— and $—)	1	1	0	1
Total other comprehensive income	1	1	0	1
Comprehensive income	653	1,838	711	2,323
Comprehensive (income) loss attributable to noncontrolling interest	0	51	0	(104)
Net income attributable to Vistra	$ 653	$ 1,889	$ 711	$ 2,219