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Goodwill and Other Intangible Assets (Tables) | 3 Months Ended
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Jul. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | The following table shows the changes in goodwill (which includes no accumulated impairment losses) during the three months ended July 31, 2025:
(Dollars in millions) | Goodwill
Balance at April 30, 2025 | $ | 1,505 |
Foreign currency translation adjustment | 2 |
Balance at July 31, 2025 | $ | 1,507 |
Schedule of Indefinite-Lived Intangible Assets [Table Text Block] | The following table presents details of our other intangible assets as of April 30, 2025 and July 31, 2025, respectively:
| April 30, 2025 |  | July 31, 2025
(Dollars in millions) | Gross Carrying Amount |  | Net Carrying Amount |  | Gross Carrying Amount |  | Net Carrying Amount
Definite-lived intangible assets: |  |  |  |  |  |  |
Supply contract | $ | — |  |  | $ | — |  |  | $ | 88 |  |  | $ | 88 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |
Trademarks and brand names | 981 |  |  | 981 |  |  | 983 |  |  | 983 |
Total other intangible assets | $ | 981 |  |  | $ | 981 |  |  | $ | 1,071 |  |  | $ | 1,071 |

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