Sales (Details) - USD ($) $ in Millions	3 Months Ended
Nov. 30, 2023	Nov. 30, 2022
Disaggregation of Revenue [Line Items]
Sales	$ 36,707	$ 33,382
Reportable Segments \| U.S. Retail Pharmacy
Disaggregation of Revenue [Line Items]
Sales	28,944	27,204
Reportable Segments \| U.S. Retail Pharmacy \| Pharmacy
Disaggregation of Revenue [Line Items]
Sales	22,384	20,218
Reportable Segments \| U.S. Retail Pharmacy \| Retail
Disaggregation of Revenue [Line Items]
Sales	6,560	6,986
Reportable Segments \| International
Disaggregation of Revenue [Line Items]
Sales	5,832	5,189
Reportable Segments \| International \| Pharmacy
Disaggregation of Revenue [Line Items]
Sales	926	867
Reportable Segments \| International \| Retail
Disaggregation of Revenue [Line Items]
Sales	1,932	1,650
Reportable Segments \| International \| Wholesale
Disaggregation of Revenue [Line Items]
Sales	2,974	2,672
Reportable Segments \| U.S. Healthcare
Disaggregation of Revenue [Line Items]
Sales	$ 1,931	$ 989

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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+ Details