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| Three Months Ended June 30, | | Six Months Ended June 30, |
| (Millions of dollars) | 2026 | | 2025 | | 2026 | | 2025 |
| Foreign currency translation | | | | | | | |
| Beginning balance | $ | (1,800) | | | $ | (2,122) | | | $ | (1,753) | | | $ | (2,310) | |
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| Gains (losses) on foreign currency translation | (49) | | | 435 | | | (95) | | | 623 | |
| Less: Tax provision (benefit) | 1 | | | — | | | 2 | | | — | |
| Net gains (losses) on foreign currency translation | (50) | | | 435 | | | (97) | | | 623 | |
| (Gains) losses reclassified to earnings | — | | | — | | | — | | | — | |
| Less: Tax provision (benefit) | — | | | — | | | — | | | — | |
| Net (gains) losses reclassified to earnings | — | | | — | | | — | | | — | |
| Other comprehensive income (loss), net of tax | (50) | | | 435 | | | (97) | | | 623 | |
| Ending balance | $ | (1,850) | | | $ | (1,687) | | | $ | (1,850) | | | $ | (1,687) | |
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| Pension and other postretirement benefits | | | | | | | |
| Beginning balance | $ | (70) | | | $ | (62) | | | $ | (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 | | | (1) | | | 1 | | | (2) | |
| Less: Tax provision (benefit) | — | | | — | | | — | | | — | |
| Net amortization of prior service (credit) cost | 1 | | | (1) | | | 1 | | | (2) | |
| Other comprehensive income (loss), net of tax | 1 | | | (1) | | | 1 | | | (2) | |
| Ending balance | $ | (69) | | | $ | (63) | | | $ | (69) | | | $ | (63) | |
| Derivative financial instruments | | | | | | | |
| Beginning balance | $ | (1) | | | $ | 11 | | | $ | 39 | | | $ | (46) | |
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| Gains (losses) deferred | 49 | | | 152 | | | (107) | | | 228 | |
| Less: Tax provision (benefit) | 12 | | | 37 | | | (27) | | | 55 | |
| Net gains (losses) deferred | 37 | | | 115 | | | (80) | | | 173 | |
| (Gains) losses reclassified to earnings | 34 | | | (72) | | | 137 | | | (73) | |
| Less: Tax provision (benefit) | 6 | | | (20) | | | 32 | | | (20) | |
| Net (gains) losses reclassified to earnings | 28 | | | (52) | | | 105 | | | (53) | |
| Other comprehensive income (loss), net of tax | 65 | | | 63 | | | 25 | | | 120 | |
| Ending balance | $ | 64 | | | $ | 74 | | | $ | 64 | | | $ | 74 | |
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| Available-for-sale securities | | | | | | | |
| Beginning balance | $ | (10) | | | $ | (32) | | | $ | 12 | | | $ | (54) | |
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| Gains (losses) deferred | 4 | | | 29 | | | (26) | | | 55 | |
| Less: Tax provision (benefit) | 5 | | | 6 | | | (4) | | | 12 | |
| Net gains (losses) deferred | (1) | | | 23 | | | (22) | | | 43 | |
| (Gains) losses reclassified to earnings | (2) | | | 1 | | | (3) | | | 3 | |
| Less: Tax provision (benefit) | (1) | | | — | | | (1) | | | — | |
| Net (gains) losses reclassified to earnings | (1) | | | 1 | | | (2) | | | 3 | |
| Other comprehensive income (loss), net of tax | (2) | | | 24 | | | (24) | | | 46 | |
| Ending balance | $ | (12) | | | $ | (8) | | | $ | (12) | | | $ | (8) | |
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Total AOCI ending balance at June 30, | $ | (1,867) | | | $ | (1,684) | | | $ | (1,867) | | | $ | (1,684) | |
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