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Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Retirement Benefits [Line Items] |  |  |
Defined Contribution Plan, Cost | $ 103 | $ 86 | $ 79
Pension Benefits |  |  |
Retirement Benefits [Line Items] |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | $ 3 |  |
Large Cap US Equitiies | 100.00% | 100.00% |
Other Postretirement Benefits |  |  |
Retirement Benefits [Line Items] |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | $ 1 |  |

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- Definition Percentage of mutual fund that is invested in large-cap U.S. equities. + References No definition available. + Details
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- Definition Retirement Benefits [Line Items] + References No definition available. + Details
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- Definition Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + 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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