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Benefit Plans and Other Postretirement Benefits Defined Contribution Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Retirement Benefits [Abstract] |  |  |
Defined Contribution Plan, Cost | $ 50 | $ 49 | $ 46
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Contribution Plan, Cost | 50 | 49 | $ 46
Estimated costs of health plan subsidies - VRP | 29 | 34 |
Estimated cost of other medical benefits - VRP | $ 4 | $ 5 |

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- References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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- Definition Estimated cost of other medical benefits - VRP + References No definition available. + Details
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- Definition Estimated costs of health plan subsidies - VRP + References No definition available. + Details
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