Postretirement and Other Employee Benefits (Accumulated Benefit Obligation) (Details) - USD ($) $ in Millions	Aug. 31, 2021	Aug. 31, 2020
Retirement Benefits [Abstract]
ABO	$ 563	$ 536
Plans with ABO in excess of plan assets
Accumulated benefit obligation	59	54
Fair value of plan assets	26	27
Plans with PBO in excess of plan assets
PBO	74	437
Fair value of plan assets	$ 26	$ 396

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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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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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

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

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