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Retirement Programs - Changes In Plan Assets and Benefit Obligations Recognized in OCI (Details) - Pensions - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |
Current year net actuarial losses (gains) | $ 480 | $ (1,259)
Amortization of net actuarial gains (losses) | 29 | (75)
Amortization of prior service credits (costs) | 1 | 1
Pension settlements | (16) | (6)
Foreign currency translation and other changes | 0 | (90)
Total recognized in other comprehensive income | $ 494 | $ (1,429)

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