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Pension And Other Postretirement Benefits (Benefit Obligations And Plan Assets Associated With Principal Benefit Plans) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Change in benefit obligation |  |  |
Medicare subsidy receipts | $ 10 | $ 19 |
Other Postretirement Benefits [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate (percent) | 5.80% | 5.30% |
Long-term rate of compensation increase (percent) | 4.00% | 4.50% |
Change in benefit obligation |  |  |
Benefit obligation at January 1 | $ 5,014 | $ 5,211 |
Service cost | 81 | 78 | $ 138
Interest cost | 250 | 276 | 216
Actuarial loss/(gain) | (81) | 176 |
Benefits paid | (534) | (545) |
Foreign exchange rate changes | (40) | 11 |
Amendments, divestments and other | 101 | (193) |
Benefit obligation at December 31 | $ 4,791 | $ 5,014 | 5,211
United States | Pension Plans, Defined Benefit [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate (percent) | 5.70% | 5.30% |
Long-term rate of compensation increase (percent) | 4.00% | 4.50% |
Change in benefit obligation |  |  |
Benefit obligation at January 1 | $ 13,143 | $ 12,350 |
Service cost | 499 | 466 | 712
Interest cost | 671 | 664 | 518
Actuarial loss/(gain) | (441) | 550 |
Benefits paid | (874) | (870) |
Amendments, divestments and other | 1 | (17) |
Benefit obligation at December 31 | 12,999 | 13,143 | 12,350
Accumulated benefit obligation at December 31 | $ 11,227 | $ 11,033 |
Pension Benefits - Non-U.S. [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate (percent) | 4.60% | 4.30% |
Long-term rate of compensation increase (percent) | 4.20% | 4.50% |
Change in benefit obligation |  |  |
Benefit obligation at January 1 | $ 21,327 | $ 19,342 |
Service cost | 338 | 323 | 570
Interest cost | 823 | 922 | 614
Actuarial loss/(gain) | (658) | 1,393 |
Benefits paid | (1,240) | (1,214) |
Foreign exchange rate changes | (1,274) | 515 |
Amendments, divestments and other | (118) | 46 |
Benefit obligation at December 31 | 19,198 | 21,327 | $ 19,342
Accumulated benefit obligation at December 31 | $ 17,818 | $ 19,769 |

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(6) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, before benefit payment, of receipt from prescription drug subsidy which increases benefit obligation of defined benefit postretirement plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-4 + Details
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