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Financial Instruments (Narrative) (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 USD ($) contract | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) contract | Sep. 30, 2022 USD ($) | Dec. 31, 2022 contract
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Number of foreign currency derivatives held | contract | 0 |  | 0 |  | 0
Foreign currency denominated debt [Member] | Net Investment Hedging [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Other comprehensive (income) loss, net investment hedge, (gain) loss, before reclassification and tax | $ | $ (101) | $ (289) | $ (32) | $ (664) |

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