Fair Value Measurements (Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions	Feb. 28, 2022	Aug. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	$ 2,881	$ 2,878
Senior Notes \| 4.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes, stated interest rate (as a percent)	4.70%
Carrying Amount	$ 500	499
Senior Notes \| 4.900% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes, stated interest rate (as a percent)	4.90%
Carrying Amount	$ 300	300
Senior Notes \| 3.950% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes, stated interest rate (as a percent)	3.95%
Carrying Amount	$ 496	496
Senior Notes \| 3.600% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes, stated interest rate (as a percent)	3.60%
Carrying Amount	$ 496	495
Senior Notes \| 3.000% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes, stated interest rate (as a percent)	3.00%
Carrying Amount	$ 592	591
Senior Notes \| 1.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes, stated interest rate (as a percent)	1.70%
Carrying Amount	$ 496	496
Senior Notes \| Carrying Amount \| Level 2 \| 4.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	500	499
Senior Notes \| Carrying Amount \| Level 2 \| 3.950% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	496	496
Senior Notes \| Carrying Amount \| Level 2 \| 3.600% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	496	495
Senior Notes \| Carrying Amount \| Level 2 \| 3.000% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	592	591
Senior Notes \| Carrying Amount \| Level 2 \| 1.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	496	496
Senior Notes \| Carrying Amount \| Level 3 \| 4.900% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	300	300
Senior Notes \| Fair Value \| Level 2 \| 4.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	509	521
Senior Notes \| Fair Value \| Level 2 \| 3.950% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	522	555
Senior Notes \| Fair Value \| Level 2 \| 3.600% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	507	541
Senior Notes \| Fair Value \| Level 2 \| 3.000% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	576	618
Senior Notes \| Fair Value \| Level 2 \| 1.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	483	504
Senior Notes \| Fair Value \| Level 3 \| 4.900% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 311	$ 322

Contractual interest rate for funds borrowed, under the debt agreement.

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+ References

No definition available.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

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