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Fair Value Measurements - Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Fair value of assets and liabilities measured on recurring basis
Investment in NuScale	$ 1,790	$ 2,266
Trading securities	4	18
Gain (loss) on Investment in NuScale	(477)
Level 1
Fair value of assets and liabilities measured on recurring basis
Trading securities	$ 4	$ 18

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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