Fair Value Information (Fair Value Of Financial Instruments) (Details) - USD ($) $ in Millions |
Jun. 30, 2024 |
Dec. 31, 2023 |
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| Carrying (Reported) Amount, Fair Value Disclosure | Fair Value, Inputs, Level 1 | ||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions | ||||||||||
| Cash and cash equivalents | [1] | $ 1,163 | $ 1,093 | |||||||
| Time deposits | [2] | 168 | 169 | |||||||
| Carrying (Reported) Amount, Fair Value Disclosure | Fair Value, Inputs, Level 2 | ||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions | ||||||||||
| Non-US government bonds Fair Value Disclosure | 30 | 0 | ||||||||
| Short-term debt | [3] | 9 | 2 | |||||||
| Long-term debt | [4] | 7,955 | 7,982 | |||||||
| Estimated Fair Value, Fair Value Disclosure | Fair Value, Inputs, Level 1 | ||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions | ||||||||||
| Cash and cash equivalents | [1] | 1,163 | 1,093 | |||||||
| Time deposits | [2] | 168 | 169 | |||||||
| Estimated Fair Value, Fair Value Disclosure | Fair Value, Inputs, Level 2 | ||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions | ||||||||||
| Non-US government bonds Fair Value Disclosure | 37 | 0 | ||||||||
| Short-term debt | [3] | 9 | 2 | |||||||
| Long-term debt | [4] | $ 7,323 | $ 7,569 | |||||||
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