10-K Filing

COSTCO WHOLESALE CORP /NEW CIK: 909832 FY 2018

Filing Information

Form Type	10-K
Accession Number	`0000909832-18-000013`
Period End Date	20180831
Filing Date	20181026
Fiscal Year	2018
Fiscal Period	FY
XBRL Instance	cost-20180902.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 90 Income Statement 187 Cash Flow Statement 109 Stockholders Equity 55 Comprehensive Income 23

Balance Sheet 90 line items

Line Item	Tag	Value	Unit	Period
Preferred stock, par value (in dollars per share)	`PreferredStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Preferred stock, par value (in dollars per share)	`PreferredStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Preferred stock, shares authorized	`PreferredStockSharesAuthorized`	100.00M	shares	Point-in-time
Preferred stock, shares authorized	`PreferredStockSharesAuthorized`	100.00M	shares	Point-in-time
Preferred stock, shares issued	`PreferredStockSharesIssued`	0.00	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$3.38B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$6.05B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$4.80B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$4.55B	USD	Point-in-time
Preferred stock, shares issued	`PreferredStockSharesIssued`	0.00	shares	Point-in-time
Short-term investments	`ShortTermInvestments`	$1.23B	USD	Point-in-time
Preferred stock, shares outstanding	`PreferredStockSharesOutstanding`	0.00	shares	Point-in-time
Short-term investments	`ShortTermInvestments`	$1.20B	USD	Point-in-time
Preferred stock, shares outstanding	`PreferredStockSharesOutstanding`	0.00	shares	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Receivables, net	`ReceivablesNetCurrent`	$1.67B	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Receivables, net	`ReceivablesNetCurrent`	$1.43B	USD	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	900.00M	shares	Point-in-time
Merchandise inventories	`InventoryNet`	$11.04B	USD	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	900.00M	shares	Point-in-time
Merchandise inventories	`InventoryNet`	$9.83B	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$272.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$321.00M	USD	Point-in-time
Common stock, shares issued	`CommonStockSharesIssued`	437.20M	shares	Point-in-time
Common stock, shares issued	`CommonStockSharesIssued`	438.19M	shares	Point-in-time
Total current assets	`AssetsCurrent`	$20.29B	USD	Point-in-time
Common stock, shares outstanding	`CommonStockSharesOutstanding`	438.19M	shares	Point-in-time
Total current assets	`AssetsCurrent`	$17.32B	USD	Point-in-time
Common stock, shares outstanding	`CommonStockSharesOutstanding`	437.20M	shares	Point-in-time
Land	`Land`	$5.69B	USD	Point-in-time
Land	`Land`	$6.19B	USD	Point-in-time
Buildings and improvements	`BuildingsAndImprovementsGross`	$15.13B	USD	Point-in-time
Buildings and improvements	`BuildingsAndImprovementsGross`	$16.11B	USD	Point-in-time
Equipment and fixtures	`FixturesAndEquipmentGross`	$6.68B	USD	Point-in-time
Equipment and fixtures	`FixturesAndEquipmentGross`	$7.27B	USD	Point-in-time
Construction in progress	`ConstructionInProgressGross`	$1.14B	USD	Point-in-time
Construction in progress	`ConstructionInProgressGross`	$843.00M	USD	Point-in-time
Gross property and equipment	`PropertyPlantAndEquipmentGross`	$28.34B	USD	Point-in-time
Gross property and equipment	`PropertyPlantAndEquipmentGross`	$30.71B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$10.18B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$11.03B	USD	Point-in-time
Net property and equipment	`PropertyPlantAndEquipmentNet`	$17.04B	USD	Point-in-time
Net property and equipment	`PropertyPlantAndEquipmentNet`	$19.68B	USD	Point-in-time
Net property and equipment	`PropertyPlantAndEquipmentNet`	$18.16B	USD	Point-in-time
OTHER ASSETS	`OtherAssetsNoncurrent`	$869.00M	USD	Point-in-time
OTHER ASSETS	`OtherAssetsNoncurrent`	$860.00M	USD	Point-in-time
TOTAL ASSETS	`Assets`	$33.16B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$40.83B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$36.35B	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$9.61B	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$11.24B	USD	Point-in-time
Accrued salaries and benefits	`EmployeeRelatedLiabilitiesCurrent`	$2.70B	USD	Point-in-time
Accrued salaries and benefits	`EmployeeRelatedLiabilitiesCurrent`	$2.99B	USD	Point-in-time
Accrued member rewards	`CustomerLoyaltyProgramLiabilityCurrent`	$961.00M	USD	Point-in-time
Accrued member rewards	`CustomerLoyaltyProgramLiabilityCurrent`	$1.06B	USD	Point-in-time
Deferred membership fees	`DeferredRevenueCurrent`	$1.62B	USD	Point-in-time
Deferred membership fees	`DeferredRevenueCurrent`	$1.50B	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$2.73B	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$3.01B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$17.50B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$19.93B	USD	Point-in-time
LONG-TERM DEBT, excluding current portion	`LongTermDebtNoncurrent`	$6.57B	USD	Point-in-time
LONG-TERM DEBT, excluding current portion	`LongTermDebtNoncurrent`	$6.49B	USD	Point-in-time
OTHER LIABILITIES	`OtherLiabilitiesNoncurrent`	$1.31B	USD	Point-in-time
OTHER LIABILITIES	`OtherLiabilitiesNoncurrent`	$1.20B	USD	Point-in-time
Total liabilities	`Liabilities`	$27.73B	USD	Point-in-time
Total liabilities	`Liabilities`	$25.27B	USD	Point-in-time
COMMITMENTS AND CONTINGENCIES	`CommitmentsAndContingencies`	-	USD	Point-in-time
COMMITMENTS AND CONTINGENCIES	`CommitmentsAndContingencies`	-	USD	Point-in-time
Preferred stock $.01 par value; 100,000,000 shares authorized; no shares issued and outstanding	`PreferredStockValue`	-	USD	Point-in-time
Preferred stock $.01 par value; 100,000,000 shares authorized; no shares issued and outstanding	`PreferredStockValue`	-	USD	Point-in-time
Common stock $0.01 par value; 900,000,000 shares authorized; 438,189,000 and 437,204,000 shares issued and outstanding	`CommonStockValue`	$4.00M	USD	Point-in-time
Common stock $0.01 par value; 900,000,000 shares authorized; 438,189,000 and 437,204,000 shares issued and outstanding	`CommonStockValue`	$4.00M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.80B	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$6.11B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-1.01B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-1.20B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$5.99B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$7.89B	USD	Point-in-time
Total Costco stockholders' equity	`StockholdersEquity`	$10.78B	USD	Point-in-time
Total Costco stockholders' equity	`StockholdersEquity`	$12.80B	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$301.00M	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$304.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.33B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$13.10B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$10.84B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.08B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$36.35B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$40.83B	USD	Point-in-time

Income Statement 187 line items

Line Item	Tag	Value	Unit	Period
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$28.10B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$29.77B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$32.99B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$118.72B	USD	Annual
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$31.81B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$44.41B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$141.58B	USD	Annual
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$28.86B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$42.30B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$32.36B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$129.03B	USD	Annual
Merchandise costs	`CostOfGoodsAndServicesSold`	$27.62B	USD	1 Quarter
Merchandise costs	`CostOfGoodsAndServicesSold`	$25.93B	USD	1 Quarter
Merchandise costs	`CostOfGoodsAndServicesSold`	$24.97B	USD	1 Quarter
Merchandise costs	`CostOfGoodsAndServicesSold`	$111.88B	USD	Annual
Merchandise costs	`CostOfGoodsAndServicesSold`	$36.70B	USD	1 Quarter
Merchandise costs	`CostOfGoodsAndServicesSold`	$123.15B	USD	Annual
Merchandise costs	`CostOfGoodsAndServicesSold`	$102.90B	USD	Annual
Merchandise costs	`CostOfGoodsAndServicesSold`	$28.73B	USD	1 Quarter
Merchandise costs	`CostOfGoodsAndServicesSold`	$24.29B	USD	1 Quarter
Merchandise costs	`CostOfGoodsAndServicesSold`	$28.13B	USD	1 Quarter
Merchandise costs	`CostOfGoodsAndServicesSold`	$38.67B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$2.94B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$2.98B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$3.22B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$13.88B	USD	Annual
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$4.12B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$3.15B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$4.26B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$12.07B	USD	Annual
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$12.95B	USD	Annual
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$3.23B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$2.91B	USD	1 Quarter
Preopening expenses	`PreOpeningCosts`	$17.00M	USD	1 Quarter
Preopening expenses	`PreOpeningCosts`	$68.00M	USD	Annual
Preopening expenses	`PreOpeningCosts`	$78.00M	USD	Annual
Preopening expenses	`PreOpeningCosts`	$30.00M	USD	1 Quarter
Preopening expenses	`PreOpeningCosts`	$31.00M	USD	1 Quarter
Preopening expenses	`PreOpeningCosts`	$82.00M	USD	Annual
Preopening expenses	`PreOpeningCosts`	$22.00M	USD	1 Quarter
Preopening expenses	`PreOpeningCosts`	$15.00M	USD	1 Quarter
Preopening expenses	`PreOpeningCosts`	$12.00M	USD	1 Quarter
Preopening expenses	`PreOpeningCosts`	$15.00M	USD	1 Quarter
Preopening expenses	`PreOpeningCosts`	$8.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$3.67B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$4.11B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$951.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$849.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$1.45B	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$1.45B	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$844.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$4.48B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.02B	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$968.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$1.07B	USD	1 Quarter
Interest expense	`InterestExpense`	$134.00M	USD	Annual
Interest expense	`InterestExpense`	$37.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$133.00M	USD	Annual
Interest expense	`InterestExpense`	$29.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$53.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$37.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$159.00M	USD	Annual
Interest expense	`InterestExpense`	$37.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$48.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$21.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$31.00M	USD	1 Quarter
Interest income and other, net	`InterestAndOtherIncome`	$-4.00M	USD	1 Quarter
Interest income and other, net	`InterestAndOtherIncome`	$41.00M	USD	1 Quarter
Interest income and other, net	`InterestAndOtherIncome`	$18.00M	USD	1 Quarter
Interest income and other, net	`InterestAndOtherIncome`	$62.00M	USD	Annual
Interest income and other, net	`InterestAndOtherIncome`	$22.00M	USD	1 Quarter
Interest income and other, net	`InterestAndOtherIncome`	$51.00M	USD	1 Quarter
Interest income and other, net	`InterestAndOtherIncome`	$80.00M	USD	Annual
Interest income and other, net	`InterestAndOtherIncome`	$22.00M	USD	1 Quarter
Interest income and other, net	`InterestAndOtherIncome`	$121.00M	USD	Annual
Interest income and other, net	`InterestAndOtherIncome`	$26.00M	USD	1 Quarter
Interest income and other, net	`InterestAndOtherIncome`	$7.00M	USD	1 Quarter
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$809.00M	USD	1 Quarter
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$986.00M	USD	1 Quarter
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$4.04B	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$965.00M	USD	1 Quarter
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.45B	USD	1 Quarter
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.07B	USD	1 Quarter
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$4.44B	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$3.62B	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$846.00M	USD	1 Quarter
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.42B	USD	1 Quarter
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$936.00M	USD	1 Quarter
Provision for income taxes	`IncomeTaxExpenseBenefit`	$273.00M	USD	1 Quarter
Provision for income taxes	`IncomeTaxExpenseBenefit`	$1.26B	USD	Annual
Provision for income taxes	`IncomeTaxExpenseBenefit`	$487.00M	USD	1 Quarter
Provision for income taxes	`IncomeTaxExpenseBenefit`	$1.24B	USD	Annual
Provision for income taxes	`IncomeTaxExpenseBenefit`	$288.00M	USD	1 Quarter
Provision for income taxes	`IncomeTaxExpenseBenefit`	$1.32B	USD	Annual
Provision for income taxes	`IncomeTaxExpenseBenefit`	$309.00M	USD	1 Quarter
Provision for income taxes	`IncomeTaxExpenseBenefit`	$291.00M	USD	1 Quarter
Provision for income taxes	`IncomeTaxExpenseBenefit`	$259.00M	USD	1 Quarter
Provision for income taxes	`IncomeTaxExpenseBenefit`	$285.00M	USD	1 Quarter
Provision for income taxes	`IncomeTaxExpenseBenefit`	$396.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$2.38B	USD	Annual
Net income including noncontrolling interests	`ProfitLoss`	$555.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$521.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$706.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$932.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$1.05B	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$2.71B	USD	Annual
Net income including noncontrolling interests	`ProfitLoss`	$651.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$713.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$762.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$3.18B	USD	Annual
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$26.00M	USD	Annual
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$6.00M	USD	1 Quarter
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$6.00M	USD	1 Quarter
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$11.00M	USD	1 Quarter
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$12.00M	USD	1 Quarter
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$10.00M	USD	1 Quarter
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$35.00M	USD	Annual
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$13.00M	USD	1 Quarter
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$12.00M	USD	1 Quarter
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$10.00M	USD	1 Quarter
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$45.00M	USD	Annual
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$701.00M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$1.04B	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$545.00M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$515.00M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$640.00M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$750.00M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$2.35B	USD	Annual
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$2.68B	USD	Annual
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$919.00M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$700.00M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COSTCO	`NetIncomeLoss`	$3.13B	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$2.38	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.24	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.71	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$5.36	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.17	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$6.11	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.46	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.59	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$7.15	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$2.10	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.60	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.24	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.45	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$5.33	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$2.08	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.59	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$6.08	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.70	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$2.36	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.17	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.59	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$7.09	USD	Annual
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	439.13M	shares	1 Quarter
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	438.82M	shares	1 Quarter
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	437.99M	shares	1 Quarter
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	438.44M	shares	Annual
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	438.74M	shares	1 Quarter
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	438.38M	shares	1 Quarter
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	439.02M	shares	1 Quarter
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	437.96M	shares	1 Quarter
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	438.51M	shares	Annual
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	438.58M	shares	Annual
Basic (shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	438.01M	shares	1 Quarter
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	441.06M	shares	1 Quarter
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	441.57M	shares	1 Quarter
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	440.94M	shares	Annual
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	440.66M	shares	1 Quarter
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	441.71M	shares	1 Quarter
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	441.26M	shares	Annual
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	440.52M	shares	1 Quarter
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	440.85M	shares	1 Quarter
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	441.04M	shares	1 Quarter
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	442.43M	shares	1 Quarter
Diluted (shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	441.83M	shares	Annual
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$0.50	USD	1 Quarter
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$0.57	USD	1 Quarter
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$0.57	USD	1 Quarter
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$2.14	USD	Annual
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$1.70	USD	Annual
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$7.50	USD	1 Quarter
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$0.45	USD	1 Quarter
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$0.50	USD	1 Quarter
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$0.50	USD	1 Quarter
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$0.45	USD	1 Quarter
CASH DIVIDEND DECLARED PER COMMON SHARE	`CommonStockDividendsPerShareDeclared`	$8.90	USD	Annual

Cash Flow Statement 109 line items

Line Item	Tag	Value	Unit	Period
Interest, interest capitalized	`InterestPaidCapitalized`	$19.00M	USD	Annual
Interest, interest capitalized	`InterestPaidCapitalized`	$19.00M	USD	Annual
Interest, interest capitalized	`InterestPaidCapitalized`	$16.00M	USD	Annual
Net income including noncontrolling interests	`ProfitLoss`	$2.38B	USD	Annual
Net income including noncontrolling interests	`ProfitLoss`	$555.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$521.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$706.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$932.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$1.05B	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$2.71B	USD	Annual
Net income including noncontrolling interests	`ProfitLoss`	$651.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$713.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$762.00M	USD	1 Quarter
Net income including noncontrolling interests	`ProfitLoss`	$3.18B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.25B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.44B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.37B	USD	Annual
Stock-based compensation	`ShareBasedCompensation`	$459.00M	USD	Annual
Stock-based compensation	`ShareBasedCompensation`	$514.00M	USD	Annual
Stock-based compensation	`ShareBasedCompensation`	$544.00M	USD	Annual
Other non-cash operating activities, net	`OtherNoncashIncomeExpense`	$6.00M	USD	Annual
Other non-cash operating activities, net	`OtherNoncashIncomeExpense`	$57.00M	USD	Annual
Other non-cash operating activities, net	`OtherNoncashIncomeExpense`	$14.00M	USD	Annual
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-269.00M	USD	Annual
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$29.00M	USD	Annual
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$49.00M	USD	Annual
Merchandise inventories	`IncreaseDecreaseInInventories`	$1.31B	USD	Annual
Merchandise inventories	`IncreaseDecreaseInInventories`	$25.00M	USD	Annual
Merchandise inventories	`IncreaseDecreaseInInventories`	$894.00M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-1.53B	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$2.26B	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$1.56B	USD	Annual
Other operating assets and liabilities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-547.00M	USD	Annual
Other operating assets and liabilities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-807.00M	USD	Annual
Other operating assets and liabilities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-421.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$3.29B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$6.73B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$5.77B	USD	Annual
Purchases of short-term investments	`PaymentsToAcquireShortTermInvestments`	$1.28B	USD	Annual
Purchases of short-term investments	`PaymentsToAcquireShortTermInvestments`	$1.43B	USD	Annual
Purchases of short-term investments	`PaymentsToAcquireShortTermInvestments`	$1.06B	USD	Annual
Maturities and sales of short-term investments	`ProceedsFromSaleAndMaturityOfMarketableSecurities`	$1.08B	USD	Annual
Maturities and sales of short-term investments	`ProceedsFromSaleAndMaturityOfMarketableSecurities`	$1.39B	USD	Annual
Maturities and sales of short-term investments	`ProceedsFromSaleAndMaturityOfMarketableSecurities`	$1.71B	USD	Annual
Additions to property and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.65B	USD	Annual
Additions to property and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.97B	USD	Annual
Additions to property and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.50B	USD	Annual
Other investing activities, net	`PaymentsForProceedsFromOtherInvestingActivities`	$-30.00M	USD	Annual
Other investing activities, net	`PaymentsForProceedsFromOtherInvestingActivities`	$-27.00M	USD	Annual
Other investing activities, net	`PaymentsForProceedsFromOtherInvestingActivities`	$-4.00M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-2.37B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-2.35B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-2.95B	USD	Annual
Change in bank checks outstanding	`IncreaseDecreaseInOutstandingChecksFinancingActivities`	$80.00M	USD	Annual
Change in bank checks outstanding	`IncreaseDecreaseInOutstandingChecksFinancingActivities`	$-236.00M	USD	Annual
Change in bank checks outstanding	`IncreaseDecreaseInOutstandingChecksFinancingActivities`	$81.00M	USD	Annual
Repayments of short-term borrowings	`RepaymentsOfShortTermDebt`	-	USD	Annual
Repayments of short-term borrowings	`RepaymentsOfShortTermDebt`	$106.00M	USD	Annual
Repayments of short-term borrowings	`RepaymentsOfShortTermDebt`	-	USD	Annual
Proceeds from short-term borrowings	`ProceedsFromShortTermDebt`	-	USD	Annual
Proceeds from short-term borrowings	`ProceedsFromShortTermDebt`	$106.00M	USD	Annual
Proceeds from short-term borrowings	`ProceedsFromShortTermDebt`	-	USD	Annual
Proceeds from issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$3.78B	USD	Annual
Proceeds from issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	Annual
Proceeds from issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$185.00M	USD	Annual
Repayments of long-term debt	`RepaymentsOfLongTermDebt`	$86.00M	USD	Annual
Repayments of long-term debt	`RepaymentsOfLongTermDebt`	$1.29B	USD	Annual
Repayments of long-term debt	`RepaymentsOfLongTermDebt`	$2.20B	USD	Annual
Tax withholdings on stock-based awards	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$202.00M	USD	Annual
Tax withholdings on stock-based awards	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$217.00M	USD	Annual
Tax withholdings on stock-based awards	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$220.00M	USD	Annual
Repurchases of common stock	`PaymentsForRepurchaseOfCommonStock`	$469.00M	USD	Annual
Repurchases of common stock	`PaymentsForRepurchaseOfCommonStock`	$328.00M	USD	Annual
Repurchases of common stock	`PaymentsForRepurchaseOfCommonStock`	$486.00M	USD	Annual
Cash dividend payments	`PaymentsOfDividends`	$689.00M	USD	Annual
Cash dividend payments	`PaymentsOfDividends`	$3.90B	USD	Annual
Cash dividend payments	`PaymentsOfDividends`	$746.00M	USD	Annual
Other financing activities, net	`ProceedsFromPaymentsForOtherFinancingActivities`	$55.00M	USD	Annual
Other financing activities, net	`ProceedsFromPaymentsForOtherFinancingActivities`	$11.00M	USD	Annual
Other financing activities, net	`ProceedsFromPaymentsForOtherFinancingActivities`	$-41.00M	USD	Annual
Net cash (used in) provided by financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-3.22B	USD	Annual
Net cash (used in) provided by financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-2.42B	USD	Annual
Net cash (used in) provided by financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-1.28B	USD	Annual
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	`EffectOfExchangeRateOnCashAndCashEquivalents`	$50.00M	USD	Annual
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	`EffectOfExchangeRateOnCashAndCashEquivalents`	$-37.00M	USD	Annual
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	`EffectOfExchangeRateOnCashAndCashEquivalents`	$25.00M	USD	Annual
Net change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$1.17B	USD	Annual
Net change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-1.42B	USD	Annual
Net change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$1.51B	USD	Annual
CASH AND CASH EQUIVALENTS BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$3.38B	USD	Point-in-time
CASH AND CASH EQUIVALENTS BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$6.05B	USD	Point-in-time
CASH AND CASH EQUIVALENTS BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$4.80B	USD	Point-in-time
CASH AND CASH EQUIVALENTS BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$4.55B	USD	Point-in-time
CASH AND CASH EQUIVALENTS END OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$3.38B	USD	Point-in-time
CASH AND CASH EQUIVALENTS END OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$6.05B	USD	Point-in-time
CASH AND CASH EQUIVALENTS END OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$4.80B	USD	Point-in-time
CASH AND CASH EQUIVALENTS END OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$4.55B	USD	Point-in-time
Interest (reduced by $19, $16, and $19, interest capitalized in 2018, 2017, and 2016, respectively)	`InterestPaidNet`	$143.00M	USD	Annual
Interest (reduced by $19, $16, and $19, interest capitalized in 2018, 2017, and 2016, respectively)	`InterestPaidNet`	$123.00M	USD	Annual
Interest (reduced by $19, $16, and $19, interest capitalized in 2018, 2017, and 2016, respectively)	`InterestPaidNet`	$131.00M	USD	Annual
Income taxes, net	`IncomeTaxesPaid`	$1.20B	USD	Annual
Income taxes, net	`IncomeTaxesPaid`	$953.00M	USD	Annual
Income taxes, net	`IncomeTaxesPaid`	$1.19B	USD	Annual
Property and equipment acquired, but not yet paid	`CapitalExpendituresIncurredButNotYetPaid`	-	USD	Annual
Property and equipment acquired, but not yet paid	`CapitalExpendituresIncurredButNotYetPaid`	$113.00M	USD	Annual
Property and equipment acquired, but not yet paid	`CapitalExpendituresIncurredButNotYetPaid`	-	USD	Annual
Cash dividend declared, but not yet paid	`DividendsPayableCurrent`	-	USD	Point-in-time
Cash dividend declared, but not yet paid	`DividendsPayableCurrent`	-	USD	Point-in-time
Cash dividend declared, but not yet paid	`DividendsPayableCurrent`	$250.00M	USD	Point-in-time

Stockholders Equity 55 line items

Line Item	Tag	Value	Unit	Period
Dividends declared	`CommonStockDividendsPerShareDeclared`	$0.50	USD	1 Quarter
Dividends declared	`CommonStockDividendsPerShareDeclared`	$0.57	USD	1 Quarter
Dividends declared	`CommonStockDividendsPerShareDeclared`	$0.57	USD	1 Quarter
Dividends declared	`CommonStockDividendsPerShareDeclared`	$2.14	USD	Annual
Dividends declared	`CommonStockDividendsPerShareDeclared`	$1.70	USD	Annual
Dividends declared	`CommonStockDividendsPerShareDeclared`	$7.50	USD	1 Quarter
Dividends declared	`CommonStockDividendsPerShareDeclared`	$0.45	USD	1 Quarter
Dividends declared	`CommonStockDividendsPerShareDeclared`	$0.50	USD	1 Quarter
Dividends declared	`CommonStockDividendsPerShareDeclared`	$0.50	USD	1 Quarter
Dividends declared	`CommonStockDividendsPerShareDeclared`	$0.45	USD	1 Quarter
Dividends declared	`CommonStockDividendsPerShareDeclared`	$8.90	USD	Annual
Common stock at beginning of period (shares)	`CommonStockSharesOutstanding`	438.19M	shares	Point-in-time
Common stock at beginning of period (shares)	`CommonStockSharesOutstanding`	437.20M	shares	Point-in-time
Equity at beginning of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.33B	USD	Point-in-time
Equity at beginning of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$13.10B	USD	Point-in-time
Equity at beginning of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$10.84B	USD	Point-in-time
Equity at beginning of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.08B	USD	Point-in-time
Net income	`ProfitLoss`	$2.38B	USD	Annual
Net income	`ProfitLoss`	$555.00M	USD	1 Quarter
Net income	`ProfitLoss`	$521.00M	USD	1 Quarter
Net income	`ProfitLoss`	$706.00M	USD	1 Quarter
Net income	`ProfitLoss`	$932.00M	USD	1 Quarter
Net income	`ProfitLoss`	$1.05B	USD	1 Quarter
Net income	`ProfitLoss`	$2.71B	USD	Annual
Net income	`ProfitLoss`	$651.00M	USD	1 Quarter
Net income	`ProfitLoss`	$713.00M	USD	1 Quarter
Net income	`ProfitLoss`	$762.00M	USD	1 Quarter
Net income	`ProfitLoss`	$3.18B	USD	Annual
Foreign-currency translation adjustment and other, net	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-192.00M	USD	Annual
Foreign-currency translation adjustment and other, net	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$98.00M	USD	Annual
Foreign-currency translation adjustment and other, net	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$26.00M	USD	Annual
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$518.00M	USD	Annual
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$547.00M	USD	Annual
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$459.00M	USD	Annual
Stock options exercised, including tax effects	`StockIssuedDuringPeriodValueStockOptionsExercised`	-	USD	Annual
Release of vested RSUs, including tax effects	`StockIssuedDuringPeriodValueRestrictedStockAwardGross`	$-165.00M	USD	Annual
Release of vested RSUs, including tax effects	`StockIssuedDuringPeriodValueRestrictedStockAwardGross`	$-146.00M	USD	Annual
Release of vested RSUs, including tax effects	`StockIssuedDuringPeriodValueRestrictedStockAwardGross`	$-217.00M	USD	Annual
Conversion of convertible notes	`StockIssuedDuringPeriodValueConversionOfConvertibleSecurities`	-	USD	Annual
Conversion of convertible notes	`StockIssuedDuringPeriodValueConversionOfConvertibleSecurities`	-	USD	Annual
Stock Repurchased and Retired During Period, Shares	`StockRepurchasedAndRetiredDuringPeriodShares`	3.00M	shares	Annual
Stock Repurchased and Retired During Period, Shares	`StockRepurchasedAndRetiredDuringPeriodShares`	3.18M	shares	Annual
Stock Repurchased and Retired During Period, Shares	`StockRepurchasedAndRetiredDuringPeriodShares`	1.76M	shares	Annual
Stock Repurchased and Retired During Period, Value	`StockRepurchasedAndRetiredDuringPeriodValue`	$473.00M	USD	Annual
Stock Repurchased and Retired During Period, Value	`StockRepurchasedAndRetiredDuringPeriodValue`	$322.00M	USD	Annual
Stock Repurchased and Retired During Period, Value	`StockRepurchasedAndRetiredDuringPeriodValue`	$477.00M	USD	Annual
Cash dividends declared and other	`DividendsCash`	$971.00M	USD	Annual
Cash dividends declared and other	`DividendsCash`	$3.94B	USD	Annual
Cash dividends declared and other	`DividendsCash`	$749.00M	USD	Annual
Common stock at end of period (shares)	`CommonStockSharesOutstanding`	438.19M	shares	Point-in-time
Common stock at end of period (shares)	`CommonStockSharesOutstanding`	437.20M	shares	Point-in-time
Equity at end of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.33B	USD	Point-in-time
Equity at end of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$13.10B	USD	Point-in-time
Equity at end of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$10.84B	USD	Point-in-time
Equity at end of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.08B	USD	Point-in-time

Comprehensive Income 23 line items

Line Item	Tag	Value	Unit	Period
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$2.38B	USD	Annual
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$555.00M	USD	1 Quarter
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$521.00M	USD	1 Quarter
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$706.00M	USD	1 Quarter
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$932.00M	USD	1 Quarter
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$1.05B	USD	1 Quarter
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$2.71B	USD	Annual
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$651.00M	USD	1 Quarter
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$713.00M	USD	1 Quarter
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$762.00M	USD	1 Quarter
NET INCOME INCLUDING NONCONTROLLING INTERESTS	`ProfitLoss`	$3.18B	USD	Annual
Foreign-currency translation adjustment and other, net	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-192.00M	USD	Annual
Foreign-currency translation adjustment and other, net	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$98.00M	USD	Annual
Foreign-currency translation adjustment and other, net	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$26.00M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$2.81B	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$2.40B	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$2.99B	USD	Annual
Less: Comprehensive income attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$48.00M	USD	Annual
Less: Comprehensive income attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$38.00M	USD	Annual
Less: Comprehensive income attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$30.00M	USD	Annual
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO	`ComprehensiveIncomeNetOfTax`	$2.37B	USD	Annual
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO	`ComprehensiveIncomeNetOfTax`	$2.95B	USD	Annual
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO	`ComprehensiveIncomeNetOfTax`	$2.76B	USD	Annual

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.