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Postretirement and Other Employee Benefits - Schedule of Accumulated Benefit Obligation (Details) - USD ($) $ in Millions | Aug. 31, 2025 | Aug. 31, 2024
--- | --- | ---
Retirement Benefits [Abstract] |  |
ABO | $ 518 | $ 495
Plans with ABO in excess of plan assets |  |
ABO | 42 | 41
Fair value of plan assets | 14 | 14
Plans with PBO in excess of plan assets |  |
PBO | 51 | 50
Fair value of plan assets | $ 14 | $ 14

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