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Pensions And Other Postretirement Benefits - Contributions and Plan Amendments (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions to defined contribution plans | $ 742,000,000 | $ 724,000,000 | $ 606,000,000
Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Years of service | 30 years |  |
Employer contributions | $ 753,000,000 | 403,000,000 | 438,000,000
Pension Plan | U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | 357,000,000 | 71,000,000 | 67,000,000
Pension Plan | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Estimated contributions in next fiscal year | 700,000,000 |  |
Employer contributions | 395,000,000 | 332,000,000 | 371,000,000
Other Postretirement Benefits Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | 348,000,000 | 387,000,000 |
Other Postretirement Benefits Plan | U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | 295,000,000 | $ 335,000,000 | $ 351,000,000
Pension Plan and Other Postretirement Benefits Plan | U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Revised monthly basic benefit | 5.00 |  |
Annual contribution | 500 |  |
Increase in pension obligation | $ 791,000,000 |  |

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