Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) shares in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Fair value of assets and liabilities measured on recurring basis
Investment in NuScale	$ 0	$ 1,579
NuScale
Fair value of assets and liabilities measured on recurring basis
Remaining shares sold (in shares)	0	111
Foreign Exchange Forward
Fair value of assets and liabilities measured on recurring basis
NuScale forward contract	$ 0	$ 208
Level 1 \| Foreign Exchange Forward
Fair value of assets and liabilities measured on recurring basis
NuScale forward contract	0	0
Level 2 \| Foreign Exchange Forward
Fair value of assets and liabilities measured on recurring basis
NuScale forward contract	0	208
Level 3 \| Foreign Exchange Forward
Fair value of assets and liabilities measured on recurring basis
NuScale forward contract	0	0
Fair Value, Measurements, Recurring
Fair value of assets and liabilities measured on recurring basis
Investment in NuScale	0	1,579
Fair Value, Measurements, Recurring \| Level 1
Fair value of assets and liabilities measured on recurring basis
Investment in NuScale	0	1,579
Fair Value, Measurements, Recurring \| Level 2
Fair value of assets and liabilities measured on recurring basis
Investment in NuScale	0	0
Fair Value, Measurements, Recurring \| Level 3
Fair value of assets and liabilities measured on recurring basis
Investment in NuScale	$ 0	$ 0