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Accounting Policies - Retirement Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 03, 2023 | Aug. 28, 2022 | Aug. 29, 2021
Accounting Policies [Abstract] |  |  |
Minimum number of days of employment to qualify for retirement plan | 90 days |  |
Defined contribution plan, cost recognized | $ 914 | $ 824 | $ 748

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- Definition Minimum number of days of employment to qualify for 401(k) Retirement Plan + References No definition available. + Details
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Namespace Prefix: | cost_
Data Type: | xbrli:durationItemType
Balance Type: | na
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- References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480794/715-70-50-1 + Details
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