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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Statement of Comprehensive Income [Abstract] |  |  |  |
Tax on foreign currency translation | $ (6) | $ 3 | $ 0 | $ 0
Tax on reclassification adjustment for amounts recognized in income | 0 | 0 | 0 | 0
Defined benefit plans: |  |  |  |
Tax on amortization of prior service cost and unrecognized gains and losses included in total benefit cost | (9) | 7 | 4 | 20
Tax on change in net actuarial gains and losses | (3) | (1) | (1) | 6
Tax on reclassification adjustment for immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures | (1) | 0 | (1) | (1)
Tax on prior service credit from plan amendments | 0 | 7 | 0 | 7
Tax effect of reclassification adjustment for amounts recognized in income | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Amount of tax expense (benefit), before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (a) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 12 -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-12 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481839/830-10-45-9 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481956/830-20-45-5 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-21 + Details
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