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Description of Business (Details) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2024 USD ($) shares | Sep. 30, 2024 USD ($) | Dec. 31, 2024 segment | Oct. 31, 2024 $ / shares
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |
Number of operating segments | segment |  |  | 3 |
Severance costs |  | $ 7 |  |
NuScale |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |
Recognized pre-tax gain on deconsolidation | $ 1,600 |  |  |
Share price (in dollars per share) | $ / shares |  |  |  | $ 13.15
Number of shares retained after deconsolidation | shares | 126,000,000 |  |  |
Additional recognized pre-tax gain on deconsolidation | $ 604 |  |  |

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- Definition Deconsolidation, Revaluation of Retained Investment, Number of Shares Retained + References No definition available. + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 49 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-49 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-18 + Details
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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