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PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Changes and amounts in AOCI for pension and other postretirement benefit plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Pension benefits |  |
Net periodic pension and other postretirement benefit cost |  |
Prior Service Credit (Cost) | $ (17) | $ (9)
Net actuarial gain (loss) | (1,738) | (2,116)
Changes in AOCI for our benefit plans, pretax |  |
Beginning balance in AOCI | (2,125) | (3,012)
Recognized prior service cost (credit) | 0 | 1
Recognized net actuarial loss (gain) | 107 | 261
Prior service credit (cost) arising in the current year | (9) | 0
Net actuarial (loss) gain arising in the current year | 232 | 623
Net foreign currency translation adjustments | 40 | 2
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax | (1,755) | (2,125)
Pension benefits | Impact of settlements |  |
Changes in AOCI for our benefit plans, pretax |  |
Recognized net actuarial loss (gain) |  | 117
Other benefits |  |
Net periodic pension and other postretirement benefit cost |  |
Prior Service Credit (Cost) | 24 | 28
Net actuarial gain (loss) | 71 | (32)
Changes in AOCI for our benefit plans, pretax |  |
Beginning balance in AOCI | (4) | (47)
Recognized prior service cost (credit) | (3) | (2)
Recognized net actuarial loss (gain) | 0 | 3
Prior service credit (cost) arising in the current year | 0 | 13
Net actuarial (loss) gain arising in the current year | 104 | 27
Net foreign currency translation adjustments | (2) | 2
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax | $ 95 | $ (4)

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