Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 2,812	$ 1,492	$ (1,210)
Other comprehensive income (loss), net of tax effects:
Effects related to pension and other retirement benefit obligations (net of tax expense of $4, $— and $7)	14	(1)	23
Total other comprehensive income (loss)	14	(1)	23
Comprehensive income (loss)	2,826	1,491	(1,187)
Comprehensive (income) loss attributable to noncontrolling interest and redeemable noncontrolling interest	(153)	1	(17)
Comprehensive income (loss) attributable to Vistra	$ 2,673	$ 1,492	$ (1,204)