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Postretirement and Other Employee Benefits - Accumulated Benefit Obligation (Details) - USD ($) $ in Millions	Aug. 31, 2022	Aug. 31, 2021
Retirement Benefits [Abstract]
ABO	$ 417	$ 563
Plans with ABO in excess of plan assets
Accumulated benefit obligation	41	59
Fair value of plan assets	19	26
Plans with PBO in excess of plan assets
PBO	51	74
Fair value of plan assets	$ 19	$ 26

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Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets.

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Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets.

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