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Financial Instruments Cross-currency forward-exchange contracts (Details) - Derivatives Designated as Hedging Instruments: - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Forward-starting interest rate swap contracts |  |  |  |
Foreign Currency Fair Value Hedge Derivative [Line Items] |  |  |  |
Unrecognized net (losses)/gains on interest swap contracts, net of tax | $ (2) | $ 1 | $ (13) | $ 3
Foreign exchange derivative instruments |  |  |  |
Foreign Currency Fair Value Hedge Derivative [Line Items] |  |  |  |
Unrecognized net (losses)/gains on interest swap contracts, net of tax | $ (74) | $ 2 | $ (107) | $ 18

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- Definition Amount, after tax, of reclassification from accumulated other comprehensive income (AOCI) of gain (loss) from increase (decrease) in fair value of net investment hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4CCC -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CCC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (b) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A + Details
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