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Other Comprehensive Income (Tables) | 3 Months Ended
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Jul. 31, 2025
Statement of Comprehensive Income [Abstract] |
Comprehensive Income (Loss) [Table Text Block] | The following table shows the components of net other comprehensive income (loss):
| Three Months Ended |  | Three Months Ended
| July 31, 2024 |  | July 31, 2025
(Dollars in millions) | Pre-Tax |  | Tax |  | Net |  | Pre-Tax |  | Tax |  | Net
Currency translation adjustments: |  |  |  |  |  |  |  |  |  |  |
Net gain (loss) on currency translation | $ | (44) |  |  | $ | 2 |  |  | $ | (42) |  |  | $ | 28 |  |  | $ | (3) |  |  | $ | 25 |
Reclassification to earnings | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Other comprehensive income (loss), net | (44) |  |  | 2 |  |  | (42) |  |  | 28 |  |  | (3) |  |  | 25 |
Cash flow hedge adjustments: |  |  |  |  |  |  |  |  |  |  |
Net gain (loss) on hedging instruments | 1 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |
Reclassification to earnings 1 | (4) |  |  | 1 |  |  | (3) |  |  | 3 |  |  | (1) |  |  | 2 |
Other comprehensive income (loss), net | (3) |  |  | 1 |  |  | (2) |  |  | 3 |  |  | (1) |  |  | 2 |
Postretirement benefits adjustments: |  |  |  |  |  |  |  |  |  |  |
Net actuarial gain (loss) and prior service cost | — |  |  | — |  |  | — |  |  | (8) |  |  | 2 |  |  | (6) |
Reclassification to earnings 2 | 1 |  |  | — |  |  | 1 |  |  | 20 |  |  | (5) |  |  | 15 |
Other comprehensive income (loss), net | 1 |  |  | — |  |  | 1 |  |  | 12 |  |  | (3) |  |  | 9 |
Total other comprehensive income (loss), net | $ | (46) |  |  | $ | 3 |  |  | $ | (43) |  |  | $ | 43 |  |  | $ | (7) |  |  | $ | 36 |
1 Pre-tax amount for each period is classified as sales in the accompanying condensed consolidated statements of operations. 2 Pre-tax amount for each period is classified as non-operating postretirement expense in the accompanying condensed consolidated statements of operations.

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 1 -Section 45 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-1 + Details
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- References No definition available. + Details
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Period Type: | duration