COSTCO WHOLESALE CORP /NEW

0001000 - Document - Cover

1001000 - Statement - Condensed Consolidated Statements Of Income

1002000 - Statement - Condensed Consolidated Statements Of Comprehensive Income

1003000 - Statement - Condensed Consolidated Balance Sheets

1003501 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)

1004000 - Statement - Consolidated Statement of Stockholders' Equity Statement

1005000 - Statement - Condensed Consolidated Statements Of Cash Flows

2101100 - Disclosure - Summary of Significant Accounting Policies

2102100 - Disclosure - Investments

2103100 - Disclosure - Fair Value Measurement

2104100 - Disclosure - Debt

2105100 - Disclosure - Leases (Notes)

2106100 - Disclosure - Equity

2110100 - Disclosure - Stock-Based Compensation Plans

2115100 - Disclosure - Income Taxes Income Taxes

2116100 - Disclosure - Net Income per Common and Common Equivalent Share

2117100 - Disclosure - Commitments and Contingencies

2118100 - Disclosure - Segment Reporting

2201201 - Disclosure - Summary of Significant Accounting Policies (Policies)

2302301 - Disclosure - Investments (Tables)

2303301 - Disclosure - Fair Value Measurement (Tables)

2304301 - Disclosure - Debt (Tables)

2305301 - Disclosure - Leases (Tables)

2306301 - Disclosure - Equity (Tables)

2310301 - Disclosure - Stock-Based Compensation Plans (Tables)

2316301 - Disclosure - Net Income per Common and Common Equivalent Share (Tables)

2318301 - Disclosure - Segment Reporting (Tables)

2401402 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)

2402402 - Disclosure - Investments - Available-for-sale and Held-to-maturity Investments (Detail)

2402403 - Disclosure - Investments - Maturities of Available-for-sale and Held-to-maturity Securities (Details)

2403402 - Disclosure - Fair Value Measurement - Fair Value of Financial Assets and Financial Liabilities Measured on Recurring Basis (Details)

2404402 - Disclosure - Debt (Carrying Value and Estimated Fair Value of Company's Long-term Debt) (Details)

2405402 - Disclosure - Leases (Details)

2406402 - Disclosure - Equity - Additional Information - Dividends (Detail)

2406403 - Disclosure - Equity (Stock Repurchased During Period) (Details)

2406404 - Disclosure - Equity - Additional Information - Stock Repurchase Programs (Details)

2410402 - Disclosure - Stock-Based Compensation Plans - Additional Information (Detail)

2410403 - Disclosure - Stock-Based Compensation Plans - Summary of RSU Transactions (Details)

2410404 - Disclosure - Stock-Based Compensation Plans - Summary of Stock-Based Compensation Expense (Details)

2416402 - Disclosure - Net Income per Common and Common Equivalent Share - Schedule of Earnings per Share Effect on Net Income and Weighted Average Number of Dilutive Potential Common Stock (Details)

2418402 - Disclosure - Segment Reporting Information by Segment (Detail)

2418403 - Disclosure - Segment Reporting Segment Reporting Information by Item Category (Details)