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Earnings Per Share (Tables) | 3 Months Ended
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Jul. 31, 2025
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table presents information concerning basic and diluted earnings per share:
|  |  | Three Months Ended |  |
|  |  | July 31, |  |
(Dollars in millions, except per share amounts) |  |  |  |  | 2024 |  | 2025 |  |  |  |
Net income available to common stockholders |  |  |  |  | $ | 195 |  |  | $ | 170 |  |  |  |  |
Share data (in thousands): |  |  |  |  |  |  |  |  |  |  |
Basic average common shares outstanding |  |  |  |  | 472,637 |  |  | 472,724 |  |  |  |  |
Dilutive effect of stock-based awards |  |  |  |  | 304 |  |  | 239 |  |  |  |  |
Diluted average common shares outstanding |  |  |  |  | 472,941 |  |  | 472,963 |  |  |  |  |
Basic earnings per share |  |  |  |  | $ | 0.41 |  |  | $ | 0.36 |  |  |  |  |
Diluted earnings per share |  |  |  |  | $ | 0.41 |  |  | $ | 0.36 |  |  |  |  |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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