Supplementary Information Foreign Currency Exchange Gain (Loss) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Foreign Currency Exchange Gain (Loss) [Line Items] | ||||||
| Pre-tax exchange (losses) gains - net | [1] | $ (75) | $ (25) | $ (142) | $ (52) | |
| Foreign Currency Transaction (Loss) Gain Tax (Expense) Benefit | 12 | (11) | 22 | (14) | ||
| Foreign Currency Transaction (Loss) Gain After Tax | (63) | (36) | (120) | (66) | ||
| Subsidiary Monetary Position | ||||||
| Foreign Currency Exchange Gain (Loss) [Line Items] | ||||||
| Pre-tax exchange (losses) gains - net | 4 | (154) | 89 | (201) | ||
| Foreign Currency Transaction (Loss) Gain Tax (Expense) Benefit | (7) | 14 | (31) | 13 | ||
| Foreign Currency Transaction (Loss) Gain After Tax | (3) | (140) | 58 | (188) | ||
| Hedging Program [Member] | ||||||
| Foreign Currency Exchange Gain (Loss) [Line Items] | ||||||
| Pre-tax exchange (losses) gains - net | (79) | 129 | (231) | 149 | ||
| Foreign Currency Transaction (Loss) Gain Tax (Expense) Benefit | 19 | (25) | 53 | (27) | ||
| Foreign Currency Transaction (Loss) Gain After Tax | $ (60) | $ 104 | $ (178) | $ 122 | ||
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