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Employee Benefit Plans - Before-Tax Amounts not Recognized in Net Periodic Benefit Cost (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Other Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Unrecognized net actuarial loss (gain) | $ 3 | $ (28)
Unrecognized prior service cost (credit) | (60) | (98)
U.S. | Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Unrecognized net actuarial loss (gain) | 123 | 172
Unrecognized prior service cost (credit) | 0 | 0
Int’l. | Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Unrecognized net actuarial loss (gain) | 585 | 681
Unrecognized prior service cost (credit) | $ 1 | $ 1

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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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