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Employee Benefit Plans (Pension and Postretirement Plans) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage Of Projected Benefit Obligation Comprised Of Domestic Plan Benefits | 86.00% | 86.00% |
Percentage Of Projected Benefit Obligation Comprised Of Foreign Plan Benefits | 11.00% | 11.00% |
Defined Benefit Plan, Accumulated Benefit Obligation | $ 46,100 | $ 49,400 |
Fair value of plan assets | $ 46,414 | $ 48,945 |
Nonqualified Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage Of Projected Benefit Obligation Comprised Of Domestic Plan Benefits | 3.00% | 3.00% |
Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 1,481 | $ 1,467 | $ 1,650
Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan Percent Of Plan Assets Concentrated in Individual Investment | 5.00% |  |
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 314 | 316 |
Other Postretirement Benefits Plan [Member] | Asset Held in Trust [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 73 | 93 |
Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Derivative, Fair Value, Net | (120) | 345 |
Fair value of plan assets | $ 46,414 | 48,945 | $ 47,960
Pension Plan [Member] | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Range Of Growth Seeking Assets In Company's Overall Investment Strategy | 46.00% |  |
Range Of Income Generating Assets In Company's Overall Investment Strategy | 74.00% |  |
Percentage Of Interest Rate Sensitivity Of Pension Plan Liabilities Fixed Income Portfolio Designed To Hedge | 80.00% |  |
Pension Plan [Member] | Minimum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Range Of Growth Seeking Assets In Company's Overall Investment Strategy | 26.00% |  |
Range Of Income Generating Assets In Company's Overall Investment Strategy | 54.00% |  |
VEBA [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 0 | $ 0 |

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- Definition This represents the percentage of which the Fixed Income Portfolio is designed to hedge the interest rate sensitivity of the pension plan liabilities. + References No definition available. + Details
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