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EMPLOYEE BENEFIT PLANS - Net Periodic Benefit Cost for Pension and Postretirement Benefit Plans (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Defined Benefit Pension Plan | U.S. Pension Benefits |  |
Net Periodic Cost: |  |
Service cost | $ 310 | $ 293
Interest cost | 644 | 627
Expected return on assets | (771) | (742)
Amortization of prior service cost | 38 | 27
Net periodic benefit cost | 221 | 205
Defined Benefit Pension Plan | International Pension Benefits |  |
Net Periodic Cost: |  |
Service cost | 11 | 11
Interest cost | 17 | 17
Expected return on assets | (21) | (21)
Amortization of prior service cost | 0 | 0
Net periodic benefit cost | 7 | 7
U.S. Postretirement Medical Benefits | U.S. Pension Benefits |  |
Net Periodic Cost: |  |
Service cost | 5 | 5
Interest cost | 27 | 29
Expected return on assets | (1) | (3)
Amortization of prior service cost | 0 | 0
Net periodic benefit cost | $ 31 | $ 31

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480535/715-20-45-3A Reference 3: 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 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-6 + Details
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