Income Taxes Income Taxes	3 Months Ended
Income Taxes Income Taxes	Nov. 22, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Note 8—Taxes The Company's reported effective income tax rate for the first quarter of 2021 was 26.3%, excluding the impact of discrete net tax benefits. The provision for income taxes was favorably impacted by discrete tax items, including $75 related to the excess tax benefit on stock compensation and $70 related to the special cash dividend payable to employees, who through the Costco 401(k) plan owned approximately 27,000,000 shares of Costco common stock through an employee stock ownership plan. Dividends on these shares are deductible for U.S. income tax purposes. Other Taxes The Company is subject to multiple examinations for value added, sales-based, payroll, product, import or other non-income taxes in various jurisdictions. In certain cases, the Company has received assessments from the authorities. The possible losses or range of possible losses associated with these matters are either immaterial or an estimate of the possible loss or range of loss cannot be made at this time. If certain matters or a group of matters were to be decided adversely to the Company, it could result in a charge that might be material to the results of an individual fiscal quarter or year.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.