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| | | Three Months Ended March 31, |
| (Millions of dollars) | | | | | 2026 | | 2025 |
| Foreign currency translation | | | | | | | |
| Beginning balance | | | | | $ | (1,753) | | | $ | (2,310) | |
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| Gains (losses) on foreign currency translation | | | | | (46) | | | 188 | |
| Less: Tax provision (benefit) | | | | | 1 | | | — | |
| Net gains (losses) on foreign currency translation | | | | | (47) | | | 188 | |
| (Gains) losses reclassified to earnings | | | | | — | | | — | |
| Less: Tax provision (benefit) | | | | | — | | | — | |
| Net (gains) losses reclassified to earnings | | | | | — | | | — | |
| Other comprehensive income (loss), net of tax | | | | | (47) | | | 188 | |
| Ending balance | | | | | $ | (1,800) | | | $ | (2,122) | |
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| Pension and other postretirement benefits | | | | | | | |
| Beginning balance | | | | | $ | (70) | | | $ | (61) | |
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| Current year prior service credit (cost) | | | | | — | | | — | |
| Less: Tax provision (benefit) | | | | | — | | | — | |
| Net current year prior service credit (cost) | | | | | — | | | — | |
| Amortization of prior service (credit) cost | | | | | — | | | (1) | |
| Less: Tax provision (benefit) | | | | | — | | | — | |
| Net amortization of prior service (credit) cost | | | | | — | | | (1) | |
| Other comprehensive income (loss), net of tax | | | | | — | | | (1) | |
| Ending balance | | | | | $ | (70) | | | $ | (62) | |
| Derivative financial instruments | | | | | | | |
| Beginning balance | | | | | $ | 39 | | | $ | (46) | |
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| Gains (losses) deferred | | | | | (156) | | | 76 | |
| Less: Tax provision (benefit) | | | | | (39) | | | 18 | |
| Net gains (losses) deferred | | | | | (117) | | | 58 | |
| (Gains) losses reclassified to earnings | | | | | 103 | | | (1) | |
| Less: Tax provision (benefit) | | | | | 26 | | | — | |
| Net (gains) losses reclassified to earnings | | | | | 77 | | | (1) | |
| Other comprehensive income (loss), net of tax | | | | | (40) | | | 57 | |
| Ending balance | | | | | $ | (1) | | | $ | 11 | |
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| Available-for-sale securities | | | | | | | |
| Beginning balance | | | | | $ | 12 | | | $ | (54) | |
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| Gains (losses) deferred | | | | | (30) | | | 26 | |
| Less: Tax provision (benefit) | | | | | (9) | | | 6 | |
| Net gains (losses) deferred | | | | | (21) | | | 20 | |
| (Gains) losses reclassified to earnings | | | | | (1) | | | 2 | |
| Less: Tax provision (benefit) | | | | | — | | | — | |
| Net (gains) losses reclassified to earnings | | | | | (1) | | | 2 | |
| Other comprehensive income (loss), net of tax | | | | | (22) | | | 22 | |
| Ending balance | | | | | $ | (10) | | | $ | (32) | |
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Total AOCI ending balance at March 31, | | | | | $ | (1,881) | | | $ | (2,205) | |
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