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Financial Instruments (Effects of Derivatives Recognized) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Derivative gain (loss) recognized in OCI | $ (1) | $ 0 | $ 8 | $ (23)
Interest rate swaps | Derivatives designated as hedging instruments |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Derivative gain (loss) recognized in OCI | (3) | 14 | 4 | 7
Euro-denominated notes | Derivatives designated as hedging instruments |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Derivative gain (loss) recognized in OCI | 8 | (5) | 23 | (14)
Foreign exchange contracts | Derivatives not designated as hedging instruments |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Derivative gain (loss) recognized in OCI | (6) | (8) | (19) | (15)
Interest rate caps | Derivatives not designated as hedging instruments |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Derivative gain (loss) recognized in OCI | $ 0 | $ (1) | $ 0 | $ (1)

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