    <SEC-DOCUMENT>0000909832-24-000075-index.html : 20241212
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    <ACCEPTANCE-DATETIME>20241212161805
    ACCESSION NUMBER:		0000909832-24-000075
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		24
    CONFORMED PERIOD OF REPORT:	20241212
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20241212
    DATE AS OF CHANGE:		20241212

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			COSTCO WHOLESALE CORP /NEW
    		CENTRAL INDEX KEY:			0000909832
    		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-VARIETY STORES [5331]
    		ORGANIZATION NAME:           	07 Trade & Services
    		IRS NUMBER:				911223280
    		STATE OF INCORPORATION:			WA
    		FISCAL YEAR END:			0901

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-20355
    		FILM NUMBER:		241545092

    	BUSINESS ADDRESS:
    		STREET 1:		999 LAKE DRIVE
    		CITY:			ISSAQUAH
    		STATE:			WA
    		ZIP:			98027-
    		BUSINESS PHONE:		4253138100

    	MAIL ADDRESS:
    		STREET 1:		999 LAKE DRIVE
    		CITY:			ISSAQUAH
    		STATE:			WA
    		ZIP:			98027

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	COSTCO COMPANIES INC
    		DATE OF NAME CHANGE:	19970401

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	PRICE/COSTCO INC
    		DATE OF NAME CHANGE:	19930728
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>cost-20241212.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: cost-20241212.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>costex9918-k121224.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: costex9918-k121224.htm

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    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>costexhibit9928-k121224.htm
    <DESCRIPTION>EX-99.2
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    Document 6 - file: cost-20241212_pre.xml

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    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>costco6.jpg
    <TEXT>
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    <SEQUENCE>11
    <FILENAME>costexhibit9928-k121224004.jpg
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    Document 11 - file: costexhibit9928-k121224004.jpg

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    <SEQUENCE>12
    <FILENAME>costexhibit9928-k121224005.jpg
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    Document 12 - file: costexhibit9928-k121224005.jpg

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    <SEQUENCE>15
    <FILENAME>costexhibit9928-k121224008.jpg
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    Document 15 - file: costexhibit9928-k121224008.jpg

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    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>R1.htm
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    Document 17 - file: R1.htm

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    <TYPE>EXCEL
    <SEQUENCE>18
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    <SEQUENCE>19
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    <SEQUENCE>20
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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>22
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    Document 22 - file: FilingSummary.html

    Document 22 - RAW XML: FilingSummary.xml

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    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>25
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