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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Sep. 03, 2023 | Aug. 28, 2022 | Aug. 29, 2021
Pay vs Performance Disclosure |  |  |
Pay vs Performance Disclosure, Table |
Year |  | Summary Compensation Table Total for PEO($)1 |  | Compensation Actually Paid to PEO($)1,2 |  | Average Summary Compensation Table Total for Non-PEO NEOs($)1 |  | Average Compensation Actually Paid to Non-PEO NEOs($)1,2 |  | Value of Initial Fixed $100 Investment Based On: |  | Net Income($)5 (in millions) |  | Net Sales Adjusted for Changes in Foreign Currencies($)6 (in millions)
TSR($)3 | Peer Group TSR($)4
2023 |  | 16,870,623 |  | 18,733,773 |  | 6,304,715 |  | 6,926,922 |  | 163.78 | 129.00 |  | 6,292 |  | 241,194
2022 |  | 9,905,070 |  | 11,868,875 |  | 5,806,023 |  | 6,353,825 |  | 158.84 | 128.26 |  | 5,844 |  | 224,492
2021 |  | 8,804,752 |  | 10,342,108 |  | 4,724,776 |  | 5,794,960 |  | 133.65 | 184.84 |  | 5,007 |  | 189,293
_______________________ (1) The principal executive officer (PEO) for all presented years was Mr. Jelinek. The Non-PEO named executive officers (Non-PEO NEOs) for each year were Mr. Galanti (all years), Mr. Vachris (all years), Mr. Miller (2023 and 2022), Mr. Riel (2023), Mr. Murphy (2022 and 2021), and Mr. Portera (2021). (2) The dollar amounts represent the amount of "compensation actually paid" or "CAP" as computed in accordance with Item 402(v) of Regulation S-K. The dollar amounts do not reflect the actual amount of compensation earned or paid to the PEO or Non-PEO NEOs during the applicable year. The following tables represent the adjustments made to the Summary Compensation Table (SCT) total compensation for each year to calculate the compensation actually paid. The valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of the grant.
PEO's Compensation Actually Paid |  | 2023 |  | 2022 |  | 2021
SCT Total |  | 16,870,623 |  | 9,905,070 |  | 8,804,752
Deduct, amounts reported under "stock awards" column in the SCT Table |  | (14,937,824) |  | (7,915,928) |  | (7,049,636)
Add, fair value at fiscal year end of outstanding and unvested stock awards granted in the current fiscal year |  | 16,788,312 |  | 8,420,028 |  | 8,709,835
Add, change in fair value of outstanding and unvested stock awards granted in prior fiscal years |  | 396,134 |  | 1,335,194 |  | —
Add, change in fair value as of vesting date (from the end of the prior fiscal year) for stock awards granted in any prior fiscal year for which vesting conditions were satisfied during the fiscal year |  | (383,472) |  | 124,511 |  | (122,843)
Compensation Actually Paid |  | 18,733,773 |  | 11,868,875 |  | 10,342,108
Non-PEO NEO's Average Compensation Actually Paid |  | 2023 |  | 2022 |  | 2021
SCT Total |  | 6,304,715 |  | 5,806,023 |  | 4,724,776
Deduct, amounts reported under "stock awards" column in the SCT Table |  | (4,973,561) |  | (4,596,112) |  | (3,650,421)
Add, fair value at fiscal year end of outstanding and unvested stock awards granted in the current fiscal year |  | 5,540,601 |  | 4,859,638 |  | 4,467,861
Add, change in fair value of outstanding and unvested stock awards granted in prior fiscal years |  | — |  | 172,963 |  | 273,929
Add, change in fair value as of vesting date (from the end of the prior fiscal year) for stock awards granted in any prior fiscal year for which vesting conditions were satisfied during the fiscal year |  | 55,167 |  | 111,313 |  | (21,185)
Compensation Actually Paid |  | 6,926,922 |  | 6,353,825 |  | 5,794,960
(3) The Total Shareholder Return (TSR) represents the cumulative total return on an initial fixed investment of $100 invested in the Company's common stock from the last day of trading in fiscal 2020 to the last day of trading in each of the applicable fiscal years. The return assumes reinvestment of dividends during the periods presented. (4) The Peer Group TSR represents the S&P Retail Select Index, the index we use in the stock performance graph required by Item 201(e) of Regulation S-K, included in our fiscal year 2023 Form 10-K, filed with the SEC on October 11, 2023. (5) Represents net income disclosed in our fiscal year 2023 Form 10-K for the years ended 2023, 2022, and 2021. (6) Represents net sales adjusted for changes in foreign currencies for the years ended 2023, 2022, and 2021. This selected measure is used as a performance condition for certain annual performance-based awards for both the PEO and Non-PEO NEOs. Please refer to Appendix A: Non-GAAP Financial Measures for a reconciliation of net sales adjusted for changes in foreign currencies, which is a non-GAAP measure, to net sales under GAAP. |  |
Company Selected Measure Name | Net Sales Adjusted for Changes in Foreign Currencies |  |
Named Executive Officers, Footnote | The principal executive officer (PEO) for all presented years was Mr. Jelinek. The Non-PEO named executive officers (Non-PEO NEOs) for each year were Mr. Galanti (all years), Mr. Vachris (all years), Mr. Miller (2023 and 2022), Mr. Riel (2023), Mr. Murphy (2022 and 2021), and Mr. Portera (2021). |  |
Peer Group Issuers, Footnote | (4) The Peer Group TSR represents the S&P Retail Select Index, the index we use in the stock performance graph required by Item 201(e) of Regulation S-K, included in our fiscal year 2023 Form 10-K, filed with the SEC on October 11, 2023. |  |
PEO Total Compensation Amount | $ 16,870,623 | $ 9,905,070 | $ 8,804,752
PEO Actually Paid Compensation Amount | $ 18,733,773 | 11,868,875 | 10,342,108
Adjustment To PEO Compensation, Footnote | (2) The dollar amounts represent the amount of "compensation actually paid" or "CAP" as computed in accordance with Item 402(v) of Regulation S-K. The dollar amounts do not reflect the actual amount of compensation earned or paid to the PEO or Non-PEO NEOs during the applicable year. The following tables represent the adjustments made to the Summary Compensation Table (SCT) total compensation for each year to calculate the compensation actually paid. The valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of the grant.
PEO's Compensation Actually Paid |  | 2023 |  | 2022 |  | 2021
SCT Total |  | 16,870,623 |  | 9,905,070 |  | 8,804,752
Deduct, amounts reported under "stock awards" column in the SCT Table |  | (14,937,824) |  | (7,915,928) |  | (7,049,636)
Add, fair value at fiscal year end of outstanding and unvested stock awards granted in the current fiscal year |  | 16,788,312 |  | 8,420,028 |  | 8,709,835
Add, change in fair value of outstanding and unvested stock awards granted in prior fiscal years |  | 396,134 |  | 1,335,194 |  | —
Add, change in fair value as of vesting date (from the end of the prior fiscal year) for stock awards granted in any prior fiscal year for which vesting conditions were satisfied during the fiscal year |  | (383,472) |  | 124,511 |  | (122,843)
Compensation Actually Paid |  | 18,733,773 |  | 11,868,875 |  | 10,342,108
Non-PEO NEO Average Total Compensation Amount | $ 6,304,715 | 5,806,023 | 4,724,776
Non-PEO NEO Average Compensation Actually Paid Amount | $ 6,926,922 | 6,353,825 | 5,794,960
Adjustment to Non-PEO NEO Compensation Footnote |
Non-PEO NEO's Average Compensation Actually Paid |  | 2023 |  | 2022 |  | 2021
SCT Total |  | 6,304,715 |  | 5,806,023 |  | 4,724,776
Deduct, amounts reported under "stock awards" column in the SCT Table |  | (4,973,561) |  | (4,596,112) |  | (3,650,421)
Add, fair value at fiscal year end of outstanding and unvested stock awards granted in the current fiscal year |  | 5,540,601 |  | 4,859,638 |  | 4,467,861
Add, change in fair value of outstanding and unvested stock awards granted in prior fiscal years |  | — |  | 172,963 |  | 273,929
Add, change in fair value as of vesting date (from the end of the prior fiscal year) for stock awards granted in any prior fiscal year for which vesting conditions were satisfied during the fiscal year |  | 55,167 |  | 111,313 |  | (21,185)
Compensation Actually Paid |  | 6,926,922 |  | 6,353,825 |  | 5,794,960
Compensation Actually Paid vs. Total Shareholder Return | The following chart shows the relationship among compensation actually paid to our PEO, the average compensation actually paid to our Non-PEO NEOs, and TSR for fiscal 2023, 2022, and 2021. Our peer group TSR is also included. Refer to footnote 3 and 4 in the table above for TSR methodology for Costco and the peer group. |  |
Compensation Actually Paid vs. Net Income | The following chart shows the relationship among compensation actually paid to our PEO, the average compensation actually paid to our Non-PEO NEOs, and net income for fiscal 2023, 2022, and 2021. |  |
Compensation Actually Paid vs. Company Selected Measure | The following chart shows the relationship among compensation actually paid to our PEO, the average compensation actually paid to our Non-PEO NEOs, and net sales adjusted for changes in foreign currencies for fiscal 2023, 2022, and 2021. |  |
Total Shareholder Return Vs Peer Group | (3) The Total Shareholder Return (TSR) represents the cumulative total return on an initial fixed investment of $100 invested in the Company's common stock from the last day of trading in fiscal 2020 to the last day of trading in each of the applicable fiscal years. The return assumes reinvestment of dividends during the periods presented. (4) The Peer Group TSR represents the S&P Retail Select Index, the index we use in the stock performance graph required by Item 201(e) of Regulation S-K, included in our fiscal year 2023 Form 10-K, filed with the SEC on October 11, 2023. |  |
Tabular List, Table | Financial Performance Measures The following list represents the most important metrics used to link Company performance to compensation actually paid for the most recently completed fiscal year. Only two measures are identified because they are the only measures used by the Company to link executive compensation to Company performance. •Net Sales Adjusted for Changes in Foreign Currencies •Income Before Income Taxes Adjusted for Changes in Foreign Currencies and Unusual Items |  |
Total Shareholder Return Amount | $ 163.78 | 158.84 | 133.65
Peer Group Total Shareholder Return Amount | 129.00 | 128.26 | 184.84
Net Income (Loss) | $ 6,292,000,000 | $ 5,844,000,000 | $ 5,007,000,000
Company Selected Measure Amount | 241,194,000,000 | 224,492,000,000 | 189,293,000,000
PEO Name | Mr. Jelinek |  |
Measure:: 1 |  |  |
Pay vs Performance Disclosure |  |  |
Name | Net Sales Adjusted for Changes in Foreign Currencies |  |
Non-GAAP Measure Description | Represents net sales adjusted for changes in foreign currencies for the years ended 2023, 2022, and 2021. This selected measure is used as a performance condition for certain annual performance-based awards for both the PEO and Non-PEO NEOs. Please refer to Appendix A: Non-GAAP Financial Measures for a reconciliation of net sales adjusted for changes in foreign currencies, which is a non-GAAP measure, to net sales under GAAP. |  |
Measure:: 2 |  |  |
Pay vs Performance Disclosure |  |  |
Name | Income Before Income Taxes Adjusted for Changes in Foreign Currencies and Unusual Items |  |
PEO | Deduct, amounts reported under "stockawards" column in the Summary Compensation Table [Member] |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount | $ (14,937,824) | $ (7,915,928) | $ (7,049,636)
PEO | Add, fair value at fiscal year end of oustanding and unvested stock awards granted in the current fiscal year [Member] |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount | 16,788,312 | 8,420,028 | 8,709,835
PEO | Add, change in fair value of outstanding and unvested stock awards granted in prior fiscal years [Member] |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount | 396,134 | 1,335,194 | 0
PEO | Add,change in fair value as of vesting date (from the end of the prior fiscal year) for stock awards granted in any prior fiscal year for which vesting conditions were satisfied during the fiscal year [Member] |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount | (383,472) | 124,511 | (122,843)
Non-PEO NEO | Deduct, amounts reported under "stockawards" column in the Summary Compensation Table [Member] |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount | (4,973,561) | (4,596,112) | (3,650,421)
Non-PEO NEO | Add, fair value at fiscal year end of oustanding and unvested stock awards granted in the current fiscal year [Member] |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount | 5,540,601 | 4,859,638 | 4,467,861
Non-PEO NEO | Add, change in fair value of outstanding and unvested stock awards granted in prior fiscal years [Member] |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount | 0 | 172,963 | 273,929
Non-PEO NEO | Add,change in fair value as of vesting date (from the end of the prior fiscal year) for stock awards granted in any prior fiscal year for which vesting conditions were satisfied during the fiscal year [Member] |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount | $ 55,167 | $ 111,313 | $ (21,185)

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