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Severance (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) employee | Dec. 31, 2022 USD ($) employee | Dec. 31, 2021 USD ($) employee
Restructuring and Related Activities [Abstract] |  |  |
Number of eligible employees | employee | 682 | 233 | 290
Severance expense | $ | $ 102 | $ 65 | $ 69

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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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