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PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Net periodic benefit cost for pension and other postretirement benefit plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Net periodic pension and other postretirement benefit cost |  |  |
Corridor Approach for Amortizing Actuarial Gains and Losses | 10.00% |  |
Pension plans |  |  |
Net periodic pension and other postretirement benefit cost |  |  |
Service cost | $ 105 | $ 94 | $ 93
Interest cost | 306 | 322 | 232
Expected Return on Plan Assets | (469) | (475) | (558)
Amortization of prior service cost (credit) | 1 | 1 | 0
Amortization of net actuarial loss (gain) | 103 | 96 | 109
Settlement charges (credits) | (2) | 81 | (1)
Curtailment credits | (1) | 0 | (1)
Special termination benefits | 1 | 1 | 1
Other | 1 | 0 | 1
Total cost (income) recognized in the statement of income | 45 | 120 | (124)
Defined Benefit Plan, Plan Assets, Payment for Settlement | 9 | 260 |
Pension plans | Defined Benefit Plan, Funded Plan |  |  |
Net periodic pension and other postretirement benefit cost |  |  |
Settlement charges (credits) | 76 |  |
Defined Benefit Plan, Plan Assets, Payment for Settlement | 259 |  |
Other postretirement benefit plans |  |  |
Net periodic pension and other postretirement benefit cost |  |  |
Service cost | 3 | 4 | 7
Interest cost | 17 | 27 | 17
Expected Return on Plan Assets | (7) | (14) | (16)
Amortization of prior service cost (credit) | (3) | (3) | (3)
Amortization of net actuarial loss (gain) | (4) | (5) | 0
Settlement charges (credits) | (19) | (14) | 0
Curtailment credits | 0 | 0 | 0
Special termination benefits | 0 | 0 | 0
Other | 0 | 0 | 0
Total cost (income) recognized in the statement of income | (13) | (5) | $ 5
Defined Benefit Plan, Plan Assets, Payment for Settlement | 92 | $ 187 |
Other postretirement benefit plans | Defined Benefit Plan, Funded Plan |  |  |
Net periodic pension and other postretirement benefit cost |  |  |
Settlement charges (credits) | (19) |  |
Defined Benefit Plan, Plan Assets, Payment for Settlement | $ 92 |  |

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit 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)(4) -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)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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