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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, 2024 | Aug. 31, 2023 | Apr. 30, 2023 | Apr. 13, 2023 | Apr. 30, 2022 | Jul. 01, 2020
--- | --- | --- | --- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Carrying Amount | $ 2,880 | $ 2,875 |  |  |  |
Senior Notes | 3.950% Senior Notes |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Stated interest rate (as a percent) | 3.95% |  |  |  |  |
Carrying Amount | $ 498 | 497 |  |  |  |
Senior Notes | 3.950% Senior Notes | Level 2 | Carrying Amount |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Carrying Amount | 498 | 497 |  |  |  |
Senior Notes | 3.950% Senior Notes | Level 2 | Fair Value |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Fair Value | $ 487 | 468 |  |  |  |
Senior Notes | 3.600% Senior Notes |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Stated interest rate (as a percent) | 3.60% |  |  |  |  |
Carrying Amount | $ 497 | 496 |  |  |  |
Senior Notes | 3.600% Senior Notes | Level 2 | Carrying Amount |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Carrying Amount | 497 | 496 |  |  |  |
Senior Notes | 3.600% Senior Notes | Level 2 | Fair Value |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Fair Value | $ 468 | 448 |  |  |  |
Senior Notes | 3.000% Senior Notes |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Stated interest rate (as a percent) | 3.00% |  |  |  |  | 3.00%
Carrying Amount | $ 594 | 593 |  |  |  |
Senior Notes | 3.000% Senior Notes | Level 2 | Carrying Amount |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Carrying Amount | 594 | 593 |  |  |  |
Senior Notes | 3.000% Senior Notes | Level 2 | Fair Value |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Fair Value | $ 529 | 502 |  |  |  |
Senior Notes | 1.700% Senior Notes |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Stated interest rate (as a percent) | 1.70% |  |  |  |  |
Carrying Amount | $ 499 | 498 |  |  |  |
Senior Notes | 1.700% Senior Notes | Level 2 | Carrying Amount |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Carrying Amount | 499 | 498 |  |  |  |
Senior Notes | 1.700% Senior Notes | Level 2 | Fair Value |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Fair Value | $ 476 | 452 |  |  |  |
Senior Notes | 4.250% Senior Notes |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Stated interest rate (as a percent) | 4.25% |  |  |  | 4.25% |
Carrying Amount | $ 496 | 495 |  |  |  |
Senior Notes | 4.250% Senior Notes | Level 2 | Carrying Amount |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Carrying Amount | 496 | 495 |  |  |  |
Senior Notes | 4.250% Senior Notes | Level 2 | Fair Value |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Fair Value | $ 495 | 478 |  |  |  |
Senior Notes | 5.450% Senior Notes |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Stated interest rate (as a percent) | 5.45% |  | 5.45% | 5.45% |  |
Carrying Amount | $ 296 | 296 |  |  |  |
Senior Notes | 5.450% Senior Notes | Level 2 | Carrying Amount |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Carrying Amount | 296 | 296 |  |  |  |
Senior Notes | 5.450% Senior Notes | Level 2 | Fair Value |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Fair Value | $ 306 | $ 297 |  |  |  |

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