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Fair Value Measurements - Schedule of Carrying Amounts and Fair Values of Notes Payable and Long-term Debt (Details) - USD ($) $ in Millions | Aug. 31, 2025 | Aug. 31, 2024 | Apr. 30, 2023 | Apr. 30, 2022
--- | --- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Carrying Amount | $ 2,885 | $ 2,880 |  |
3.950% Senior Notes | Senior Notes |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Stated interest rate (as a percent) | 3.95% |  |  |
Carrying Amount | $ 499 | 498 |  |
3.950% Senior Notes | Senior Notes | Level 2 | Carrying Amount |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Carrying Amount | 499 | 498 |  |
3.950% Senior Notes | Senior Notes | Level 2 | Fair Value |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Fair Value | $ 496 | 487 |  |
3.600% Senior Notes | Senior Notes |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Stated interest rate (as a percent) | 3.60% |  |  |
Carrying Amount | $ 498 | 497 |  |
3.600% Senior Notes | Senior Notes | Level 2 | Carrying Amount |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Carrying Amount | 498 | 497 |  |
3.600% Senior Notes | Senior Notes | Level 2 | Fair Value |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Fair Value | $ 480 | 468 |  |
3.000% Senior Notes | Senior Notes |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Stated interest rate (as a percent) | 3.00% |  |  |
Carrying Amount | $ 595 | 594 |  |
3.000% Senior Notes | Senior Notes | Level 2 | Carrying Amount |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Carrying Amount | 595 | 594 |  |
3.000% Senior Notes | Senior Notes | Level 2 | Fair Value |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Fair Value | $ 551 | 529 |  |
1.700% Senior Notes | Senior Notes |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Stated interest rate (as a percent) | 1.70% |  |  |
Carrying Amount | $ 499 | 499 |  |
1.700% Senior Notes | Senior Notes | Level 2 | Carrying Amount |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Carrying Amount | 499 | 499 |  |
1.700% Senior Notes | Senior Notes | Level 2 | Fair Value |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Fair Value | $ 492 | 476 |  |
4.250% Senior Notes | Senior Notes |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Stated interest rate (as a percent) | 4.25% |  |  | 4.25%
Carrying Amount | $ 497 | 496 |  |
4.250% Senior Notes | Senior Notes | Level 2 | Carrying Amount |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Carrying Amount | 497 | 496 |  |
4.250% Senior Notes | Senior Notes | Level 2 | Fair Value |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Fair Value | $ 500 | 495 |  |
5.450% Senior Notes | Senior Notes |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Stated interest rate (as a percent) | 5.45% |  | 5.45% |
Carrying Amount | $ 297 | 296 |  |
5.450% Senior Notes | Senior Notes | Level 2 | Carrying Amount |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Carrying Amount | 297 | 296 |  |
5.450% Senior Notes | Senior Notes | Level 2 | Fair Value |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Fair Value | $ 308 | $ 306 |  |

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