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PENSION AND OTHER POSTRETIREMENT BENEFITS - Net Periodic Benefit (Income) Cost Recognized in Other Comprehensive (Income) Loss (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Other Postretirement Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | $ 0 | $ 0 | $ 0
Interest cost | 6 | 5 | 5
Amortization of prior service (credit) cost | (20) | (42) | (74)
Recognition of actuarial (gains) losses | (13) | (4) | (2)
Net periodic benefit (income) cost | (27) | (41) | (71)
Actuarial (gains) losses | 3 | (54) | (8)
Prior service (credit) cost | 0 | 0 | 0
Prior service credit recognized during year | 20 | 42 | 74
Actuarial (gains) losses recognized during year | 13 | 4 | 2
Total recognized in Other comprehensive (income) loss | 36 | (8) | 68
Total recognized in net periodic benefit (income) cost and Other comprehensive (income) loss | 9 | (49) | (3)
Pension ongoing income—non-service | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | 29 | 86 | 105
Interest cost | 645 | 380 | 306
Expected return on plan assets | (1,111) | (1,281) | (1,220)
Amortization of prior service (credit) cost | (42) | (42) | (42)
Recognition of actuarial (gains) losses | 0 | (14) | 31
Settlements and curtailments | 0 | (2) | 0
Net periodic benefit (income) cost | (479) | (873) | (820)
Actuarial (gains) losses | 378 | 307 | (14)
Prior service (credit) cost | 0 | 0 | 0
Prior service credit recognized during year | 42 | 43 | 43
Actuarial (gains) losses recognized during year | 0 | 15 | 0
Foreign currency translation | 0 | 0 | 0
Total recognized in Other comprehensive (income) loss | 420 | 365 | 29
Total recognized in net periodic benefit (income) cost and Other comprehensive (income) loss | (59) | (508) | (791)
Pension ongoing income—non-service | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | 11 | 19 | 26
Interest cost | 200 | 103 | 77
Expected return on plan assets | (274) | (278) | (348)
Amortization of prior service (credit) cost | 0 | 0 | 0
Recognition of actuarial (gains) losses | 153 | 537 | 9
Settlements and curtailments | 0 | 0 | 0
Net periodic benefit (income) cost | 90 | 381 | (236)
Actuarial (gains) losses | 198 | 294 | (221)
Prior service (credit) cost | 0 | 0 | (3)
Prior service credit recognized during year | 0 | (1) | (1)
Actuarial (gains) losses recognized during year | (153) | (537) | (9)
Foreign currency translation | 17 | 204 | (1)
Total recognized in Other comprehensive (income) loss | 62 | (40) | (235)
Total recognized in net periodic benefit (income) cost and Other comprehensive (income) loss | $ 152 | $ 341 | $ (471)

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