2.4.0.8 Html 459 667 1 true 142 0 false 12 false false R1.htm 1001 - Document - Document and Entity Information Sheet http://www.yahoo.com/taxonomy/role/DocumentandEntityInformation Document and Entity Information true false R2.htm 1003 - Statement - Consolidated Balance Sheets Sheet http://www.yahoo.com/taxonomy/role/StatementOfFinancialPositionClassified Consolidated Balance Sheets false false R3.htm 1004 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.yahoo.com/taxonomy/role/StatementOfFinancialPositionClassifiedParenthetical Consolidated Balance Sheets (Parenthetical) false false R4.htm 1005 - Statement - Consolidated Statements of Income Sheet http://www.yahoo.com/taxonomy/role/StatementOfIncomeAlternative Consolidated Statements of Income false false R5.htm 1006 - Statement - Consolidated Statements of Comprehensive Income Sheet http://www.yahoo.com/taxonomy/role/StatementOfOtherComprehensiveIncome Consolidated Statements of Comprehensive Income false false R6.htm 1007 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) Sheet http://www.yahoo.com/taxonomy/role/StatementOfOtherComprehensiveIncomeParenthetical Consolidated Statements of Comprehensive Income (Parenthetical) false false R7.htm 1008 - Statement - Consolidated Statements of Stockholders' Equity Sheet http://www.yahoo.com/taxonomy/role/StatementOfShareholdersEquityAndOtherComprehensiveIncome Consolidated Statements of Stockholders' Equity false false R8.htm 1009 - Statement - Consolidated Statements of Cash Flows Sheet http://www.yahoo.com/taxonomy/role/StatementOfCashFlowsIndirect Consolidated Statements of Cash Flows false false R9.htm 1010 - Statement - Consolidated Statements of Cash Flows (Parenthetical) Sheet http://www.yahoo.com/taxonomy/role/StatementOfCashFlowsIndirectParenthetical Consolidated Statements of Cash Flows (Parenthetical) false false R10.htm 1011 - Disclosure - THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES false false R11.htm 1012 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENTS Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsInvestmentsAndFairValueMeasurementDisclosureTextBlock INVESTMENTS AND FAIR VALUE MEASUREMENTS false false R12.htm 1013 - Disclosure - CONSOLIDATED FINANCIAL STATEMENT DETAILS Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsCondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock CONSOLIDATED FINANCIAL STATEMENT DETAILS false false R13.htm 1014 - Disclosure - ACQUISITIONS Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsBusinessCombinationDisclosureTextBlock ACQUISITIONS false false R14.htm 1015 - Disclosure - GOODWILL Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsGoodwillDisclosureTextBlock GOODWILL false false R15.htm 1016 - Disclosure - INTANGIBLE ASSETS, NET Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsIntangibleAssetsDisclosureTextBlock INTANGIBLE ASSETS, NET false false R16.htm 1017 - Disclosure - BASIC AND DILUTED NET INCOME ATTRIBUTABLE TO YAHOO! INC. COMMON STOCKHOLDERS PER SHARE Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlock BASIC AND DILUTED NET INCOME ATTRIBUTABLE TO YAHOO! INC. COMMON STOCKHOLDERS PER SHARE false false R17.htm 1018 - Disclosure - INVESTMENTS IN EQUITY INTERESTS Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsEquityMethodInvestmentsDisclosureTextBlock INVESTMENTS IN EQUITY INTERESTS false false R18.htm 1019 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsDerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock DERIVATIVE FINANCIAL INSTRUMENTS false false R19.htm 1020 - Disclosure - CREDIT AGREEMENT Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsDebtDisclosureTextBlock CREDIT AGREEMENT false false R20.htm 1021 - Disclosure - CONVERTIBLE NOTES Notes http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsConvertibleNotesTextBlock CONVERTIBLE NOTES false false R21.htm 1022 - Disclosure - COMMITMENTS AND CONTINGENCIES Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock COMMITMENTS AND CONTINGENCIES false false R22.htm 1023 - Disclosure - STOCKHOLDERS' EQUITY Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlock STOCKHOLDERS' EQUITY false false R23.htm 1024 - Disclosure - EMPLOYEE BENEFITS Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock EMPLOYEE BENEFITS false false R24.htm 1025 - Disclosure - RESTRUCTURING CHARGES, NET Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlock RESTRUCTURING CHARGES, NET false false R25.htm 1026 - Disclosure - INCOME TAXES Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlock INCOME TAXES false false R26.htm 1027 - Disclosure - TRANSACTIONS WITH RELATED PARTIES Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsRelatedPartyTransactionsDisclosureTextBlock TRANSACTIONS WITH RELATED PARTIES false false R27.htm 1028 - Disclosure - SEGMENTS Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlock SEGMENTS false false R28.htm 1029 - Disclosure - SEARCH AGREEMENT WITH MICROSOFT CORPORATION Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsCollaborativeArrangementDisclosureTextBlock SEARCH AGREEMENT WITH MICROSOFT CORPORATION false false R29.htm 1030 - Disclosure - SUBSEQUENT EVENTS Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsScheduleOfSubsequentEventsTextBlock SUBSEQUENT EVENTS false false R30.htm 1031 - Disclosure - Schedule II-Valuation and Qualifying Accounts Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock Schedule II-Valuation and Qualifying Accounts false false R31.htm 1032 - Disclosure - Selected Quarterly Financial Data Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsQuarterlyFinancialInformationTextBlock Selected Quarterly Financial Data false false R32.htm 1033 - Disclosure - THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlockPolicies THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) false false R33.htm 1034 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENTS (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsInvestmentsAndFairValueMeasurementDisclosureTextBlockTables INVESTMENTS AND FAIR VALUE MEASUREMENTS (Tables) false false R34.htm 1035 - Disclosure - CONSOLIDATED FINANCIAL STATEMENT DETAILS (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsCondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlockTables CONSOLIDATED FINANCIAL STATEMENT DETAILS (Tables) false false R35.htm 1036 - Disclosure - ACQUISITIONS (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsBusinessCombinationDisclosureTextBlockTables ACQUISITIONS (Tables) false false R36.htm 1037 - Disclosure - GOODWILL (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsGoodwillDisclosureTextBlockTables GOODWILL (Tables) false false R37.htm 1038 - Disclosure - INTANGIBLE ASSETS, NET (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsIntangibleAssetsDisclosureTextBlockTables INTANGIBLE ASSETS, NET (Tables) false false R38.htm 1039 - Disclosure - BASIC AND DILUTED NET INCOME ATTRIBUTABLE TO YAHOO! INC. COMMON STOCKHOLDERS PER SHARE (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlockTables BASIC AND DILUTED NET INCOME ATTRIBUTABLE TO YAHOO! INC. COMMON STOCKHOLDERS PER SHARE (Tables) false false R39.htm 1040 - Disclosure - INVESTMENTS IN EQUITY INTERESTS (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsEquityMethodInvestmentsDisclosureTextBlockTables INVESTMENTS IN EQUITY INTERESTS (Tables) false false R40.htm 1041 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsDerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlockTables DERIVATIVE FINANCIAL INSTRUMENTS (Tables) false false R41.htm 1042 - Disclosure - CONVERTIBLE NOTES (Tables) Notes http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsConvertibleNotesTextBlockTables CONVERTIBLE NOTES (Tables) false false R42.htm 1043 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlockTables COMMITMENTS AND CONTINGENCIES (Tables) false false R43.htm 1044 - Disclosure - EMPLOYEE BENEFITS (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockTables EMPLOYEE BENEFITS (Tables) false false R44.htm 1045 - Disclosure - RESTRUCTURING CHARGES, NET (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlockTables RESTRUCTURING CHARGES, NET (Tables) false false R45.htm 1046 - Disclosure - INCOME TAXES (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlockTables INCOME TAXES (Tables) false false R46.htm 1047 - Disclosure - SEGMENTS (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables SEGMENTS (Tables) false false R47.htm 1048 - Disclosure - Selected Quarterly Financial Data (Tables) Sheet http://www.yahoo.com/taxonomy/role/NotesToFinancialStatementsQuarterlyFinancialInformationTextBlockTables Selected Quarterly Financial Data (Tables) false false R48.htm 1049 - Disclosure - Company and Summary of Significant Accounting Policies - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureCompanyAndSummaryOfSignificantAccountingPoliciesAdditionalInformation Company and Summary of Significant Accounting Policies - Additional Information (Detail) false false R49.htm 1050 - Disclosure - Investments in Available for Sale Securities (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureInvestmentsInAvailableForSaleSecurities Investments in Available for Sale Securities (Detail) false false R50.htm 1051 - Disclosure - Available for Sale Securities by Balance Sheet Location (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureAvailableForSaleSecuritiesByBalanceSheetLocation Available for Sale Securities by Balance Sheet Location (Detail) false false R51.htm 1052 - Disclosure - Available for Sale Securities by Contractual Maturities (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureAvailableForSaleSecuritiesByContractualMaturities Available for Sale Securities by Contractual Maturities (Detail) false false R52.htm 1053 - Disclosure - Investments in Unrealized Loss Position (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureInvestmentsInUnrealizedLossPosition Investments in Unrealized Loss Position (Detail) false false R53.htm 1054 - Disclosure - Investment and Fair Value Measurements - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureInvestmentAndFairValueMeasurementsAdditionalInformation Investment and Fair Value Measurements - Additional Information (Detail) false false R54.htm 1055 - Disclosure - Fair Value of Financial Assets (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureFairValueOfFinancialAssets Fair Value of Financial Assets (Detail) false false R55.htm 1056 - Disclosure - Fair Value of Financial Assets (Parenthetical) (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureFairValueOfFinancialAssetsParenthetical Fair Value of Financial Assets (Parenthetical) (Detail) false false R56.htm 1057 - Disclosure - Consolidated Financial Statement Details (Prepaid Expenses And Other Current Assets) (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureConsolidatedFinancialStatementDetailsPrepaidExpensesAndOtherCurrentAssets Consolidated Financial Statement Details (Prepaid Expenses And Other Current Assets) (Detail) false false R57.htm 1058 - Disclosure - Property and Equipment Net (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosurePropertyAndEquipmentNet Property and Equipment Net (Detail) false false R58.htm 1059 - Disclosure - Property and Equipment Net (Parenthetical) (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosurePropertyAndEquipmentNetParenthetical Property and Equipment Net (Parenthetical) (Detail) false false R59.htm 1060 - Disclosure - Other Long-Term Assets (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureOtherLongTermAssets Other Long-Term Assets (Detail) false false R60.htm 1061 - Disclosure - Accrued Expenses and Other Current Liabilities (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilities Accrued Expenses and Other Current Liabilities (Detail) false false R61.htm 1062 - Disclosure - Deferred and Other Long-Term Tax Liabilities Net (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureDeferredAndOtherLongTermTaxLiabilitiesNet Deferred and Other Long-Term Tax Liabilities Net (Detail) false false R62.htm 1063 - Disclosure - Accumulated Other Comprehensive Income (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncome Accumulated Other Comprehensive Income (Detail) false false R63.htm 1064 - Disclosure - Noncontrolling Interests (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureNoncontrollingInterests Noncontrolling Interests (Detail) false false R64.htm 1065 - Disclosure - Other Income, Net (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureOtherIncomeNet Other Income, Net (Detail) false false R65.htm 1066 - Disclosure - Consolidated Financial Statement Details - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureConsolidatedFinancialStatementDetailsAdditionalInformation Consolidated Financial Statement Details - Additional Information (Detail) false false R66.htm 1067 - Disclosure - Reclassifications Out of Accumulated Other Comprehensive Income (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureReclassificationsOutOfAccumulatedOtherComprehensiveIncome Reclassifications Out of Accumulated Other Comprehensive Income (Detail) false false R67.htm 1068 - Disclosure - Reclassifications Out of Accumulated Other Comprehensive Income (Parenthetical) (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureReclassificationsOutOfAccumulatedOtherComprehensiveIncomeParenthetical Reclassifications Out of Accumulated Other Comprehensive Income (Parenthetical) (Detail) false false R68.htm 1069 - Disclosure - Summary of Significant Acquisitions (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureSummaryOfSignificantAcquisitions Summary of Significant Acquisitions (Detail) false false R69.htm 1070 - Disclosure - Acquisitions - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureAcquisitionsAdditionalInformation Acquisitions - Additional Information (Detail) false false R70.htm 1071 - Disclosure - Allocation of Purchase Price of Assets Acquired and Liabilities Assumed, Interclick (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedInterclick Allocation of Purchase Price of Assets Acquired and Liabilities Assumed, Interclick (Detail) false false R71.htm 1072 - Disclosure - Allocation of Purchase Price of Assets Acquired and Liabilities Assumed, Tumblr (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedTumblr Allocation of Purchase Price of Assets Acquired and Liabilities Assumed, Tumblr (Detail) false false R72.htm 1073 - Disclosure - Goodwill (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureGoodwill Goodwill (Detail) false false R73.htm 1074 - Disclosure - Goodwill (Parenthetical) (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureGoodwillParenthetical Goodwill (Parenthetical) (Detail) false false R74.htm 1075 - Disclosure - Goodwill - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureGoodwillAdditionalInformation Goodwill - Additional Information (Detail) false false R75.htm 1076 - Disclosure - Intangible Assets Net (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureIntangibleAssetsNet Intangible Assets Net (Detail) false false R76.htm 1077 - Disclosure - Intangible Assets Net (Parenthetical) (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureIntangibleAssetsNetParenthetical Intangible Assets Net (Parenthetical) (Detail) false false R77.htm 1078 - Disclosure - Intangible Assets Net - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureIntangibleAssetsNetAdditionalInformation Intangible Assets Net - Additional Information (Detail) false false R78.htm 1079 - Disclosure - Basic and Diluted Net Income Attributable to Yahoo Inc. Common Stockholders Per Share - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureBasicAndDilutedNetIncomeAttributableToYahooIncCommonStockholdersPerShareAdditionalInformation Basic and Diluted Net Income Attributable to Yahoo Inc. Common Stockholders Per Share - Additional Information (Detail) false false R79.htm 1080 - Disclosure - Computation of Basic and Diluted Net Income per Share (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureComputationOfBasicAndDilutedNetIncomePerShare Computation of Basic and Diluted Net Income per Share (Detail) false false R80.htm 1081 - Disclosure - Investments in Equity Interests (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureInvestmentsInEquityInterests Investments in Equity Interests (Detail) false false R81.htm 1082 - Disclosure - Investments in Equity Interests - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureInvestmentsInEquityInterestsAdditionalInformation Investments in Equity Interests - Additional Information (Detail) false false R82.htm 1083 - Disclosure - Alibaba Group Condensed Financial Information Operating Data (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureAlibabaGroupCondensedFinancialInformationOperatingData Alibaba Group Condensed Financial Information Operating Data (Detail) false false R83.htm 1084 - Disclosure - Alibaba Group Condensed Financial Information Balance Sheet Data (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureAlibabaGroupCondensedFinancialInformationBalanceSheetData Alibaba Group Condensed Financial Information Balance Sheet Data (Detail) false false R84.htm 1085 - Disclosure - Yahoo Japan Condensed Financial Information Operating Data (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureYahooJapanCondensedFinancialInformationOperatingData Yahoo Japan Condensed Financial Information Operating Data (Detail) false false R85.htm 1086 - Disclosure - Yahoo Japan Condensed Financial Information Balance Sheet Data (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureYahooJapanCondensedFinancialInformationBalanceSheetData Yahoo Japan Condensed Financial Information Balance Sheet Data (Detail) false false R86.htm 1087 - Disclosure - Derivative Financial Instruments - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureDerivativeFinancialInstrumentsAdditionalInformation Derivative Financial Instruments - Additional Information (Detail) false false R87.htm 1088 - Disclosure - Foreign Currency Forward Contracts Activity (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureForeignCurrencyForwardContractsActivity Foreign Currency Forward Contracts Activity (Detail) false false R88.htm 1089 - Disclosure - Foreign Currency Forward Contracts Activity (Parenthetical) (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureForeignCurrencyForwardContractsActivityParenthetical Foreign Currency Forward Contracts Activity (Parenthetical) (Detail) false false R89.htm 1090 - Disclosure - Credit Agreement - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureCreditAgreementAdditionalInformation Credit Agreement - Additional Information (Detail) false false R90.htm 1091 - Disclosure - Convertible Notes - Additional Information (Detail) Notes http://www.yahoo.com/taxonomy/role/DisclosureConvertibleNotesAdditionalInformation Convertible Notes - Additional Information (Detail) false false R91.htm 1092 - Disclosure - Schedule of Notes (Detail) Notes http://www.yahoo.com/taxonomy/role/DisclosureScheduleOfNotes Schedule of Notes (Detail) false false R92.htm 1093 - Disclosure - Interest Expense Recognized Related To Notes (Detail) Notes http://www.yahoo.com/taxonomy/role/DisclosureInterestExpenseRecognizedRelatedToNotes Interest Expense Recognized Related To Notes (Detail) false false R93.htm 1094 - Disclosure - Fair Value and Carrying Value of Notes (Detail) Notes http://www.yahoo.com/taxonomy/role/DisclosureFairValueAndCarryingValueOfNotes Fair Value and Carrying Value of Notes (Detail) false false R94.htm 1095 - Disclosure - Commitments and Contingencies - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformation Commitments and Contingencies - Additional Information (Detail) false false R95.htm 1096 - Disclosure - Lease Commitments (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureLeaseCommitments Lease Commitments (Detail) false false R96.htm 1097 - Disclosure - Capital Lease Commitment (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureCapitalLeaseCommitment Capital Lease Commitment (Detail) false false R97.htm 1098 - Disclosure - Stockholders' Equity - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureStockholdersEquityAdditionalInformation Stockholders' Equity - Additional Information (Detail) false false R98.htm 1099 - Disclosure - Employee Benefits - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureEmployeeBenefitsAdditionalInformation Employee Benefits - Additional Information (Detail) false false R99.htm 1100 - Disclosure - Stock Option Activity (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureStockOptionActivity Stock Option Activity (Detail) false false R100.htm 1101 - Disclosure - Weighted Average Assumptions Used to Calculate Fair Value of Options Granted (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureWeightedAverageAssumptionsUsedToCalculateFairValueOfOptionsGranted Weighted Average Assumptions Used to Calculate Fair Value of Options Granted (Detail) false false R101.htm 1102 - Disclosure - Weighted Average Assumptions Used to Calculate Fair Value of Options Granted (Parenthetical) (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureWeightedAverageAssumptionsUsedToCalculateFairValueOfOptionsGrantedParenthetical Weighted Average Assumptions Used to Calculate Fair Value of Options Granted (Parenthetical) (Detail) false false R102.htm 1103 - Disclosure - Restricted Stock Awards Activity (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureRestrictedStockAwardsActivity Restricted Stock Awards Activity (Detail) false false R103.htm 1104 - Disclosure - Restructuring Charges (Reversals), Net (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureRestructuringChargesReversalsNet Restructuring Charges (Reversals), Net (Detail) false false R104.htm 1105 - Disclosure - Restructuring Charges, Net by Segment (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureRestructuringChargesNetBySegment Restructuring Charges, Net by Segment (Detail) false false R105.htm 1106 - Disclosure - Restructuring Charges Net - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureRestructuringChargesNetAdditionalInformation Restructuring Charges Net - Additional Information (Detail) false false R106.htm 1107 - Disclosure - Restructuring Accrual Activity (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureRestructuringAccrualActivity Restructuring Accrual Activity (Detail) false false R107.htm 1108 - Disclosure - Classification of Restructuring Accruals (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureClassificationOfRestructuringAccruals Classification of Restructuring Accruals (Detail) false false R108.htm 1109 - Disclosure - Restructuring Accruals by Segment (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureRestructuringAccrualsBySegment Restructuring Accruals by Segment (Detail) false false R109.htm 1110 - Disclosure - Income Before Income Taxes and Earnings in Equity Interests (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureIncomeBeforeIncomeTaxesAndEarningsInEquityInterests Income Before Income Taxes and Earnings in Equity Interests (Detail) false false R110.htm 1111 - Disclosure - Provision For Income Tax (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureProvisionForIncomeTax Provision For Income Tax (Detail) false false R111.htm 1112 - Disclosure - Reconciliation Tax Computed by Applying Statutory Income Tax Rate (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureReconciliationTaxComputedByApplyingStatutoryIncomeTaxRate Reconciliation Tax Computed by Applying Statutory Income Tax Rate (Detail) false false R112.htm 1113 - Disclosure - Deferred Income Tax Assets and Liabilities (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureDeferredIncomeTaxAssetsAndLiabilities Deferred Income Tax Assets and Liabilities (Detail) false false R113.htm 1114 - Disclosure - Income Taxes - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation Income Taxes - Additional Information (Detail) false false R114.htm 1115 - Disclosure - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureReconciliationOfBeginningAndEndingAmountOfUnrecognizedTaxBenefits Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) false false R115.htm 1116 - Disclosure - Unrecognized Tax Benefits Recorded on Consolidated Balance Sheets (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureUnrecognizedTaxBenefitsRecordedOnConsolidatedBalanceSheets Unrecognized Tax Benefits Recorded on Consolidated Balance Sheets (Detail) false false R116.htm 1117 - Disclosure - Related Party Transactions - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformation Related Party Transactions - Additional Information (Detail) false false R117.htm 1118 - Disclosure - Segment Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureSegmentInformation Segment Information (Detail) false false R118.htm 1119 - Disclosure - Capital Expenditures by Segment (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureCapitalExpendituresBySegment Capital Expenditures by Segment (Detail) false false R119.htm 1120 - Disclosure - Property and Equipment Net by Segment (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosurePropertyAndEquipmentNetBySegment Property and Equipment Net by Segment (Detail) false false R120.htm 1121 - Disclosure - Revenues for Groups of Similar Services (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureRevenuesForGroupsOfSimilarServices Revenues for Groups of Similar Services (Detail) false false R121.htm 1122 - Disclosure - Search Agreement with Microsoft Corporation - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureSearchAgreementWithMicrosoftCorporationAdditionalInformation Search Agreement with Microsoft Corporation - Additional Information (Detail) false false R122.htm 1123 - Disclosure - Subsequent Events - Additional Information (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureSubsequentEventsAdditionalInformation Subsequent Events - Additional Information (Detail) false false R123.htm 1124 - Disclosure - Valuation And Qualifying Accounts (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureValuationAndQualifyingAccounts Valuation And Qualifying Accounts (Detail) false false R124.htm 1125 - Disclosure - Selected Quarterly Financial Data (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureSelectedQuarterlyFinancialData Selected Quarterly Financial Data (Detail) false false R125.htm 1126 - Disclosure - Selected Quarterly Financial Data (Parenthetical) (Detail) Sheet http://www.yahoo.com/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataParenthetical Selected Quarterly Financial Data (Parenthetical) (Detail) false false All Reports Book All Reports Element invest_DerivativeNotionalAmount had a mix of decimals attribute values: -8 -6. Element us-gaap_GoodwillGross had a mix of decimals attribute values: -8 -6. Element us-gaap_LossContingencyDamagesSoughtValue had a mix of decimals attribute values: -8 -7. Element us-gaap_OtherInterestAndDividendIncome had a mix of decimals attribute values: -6 -3. Element us-gaap_PaymentsForHedgeInvestingActivities had a mix of decimals attribute values: -6 -3. Element us-gaap_PaymentsToAcquireBusinessesGross had a mix of decimals attribute values: -8 -3. Element us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired had a mix of decimals attribute values: -6 -3. Element us-gaap_ProceedsFromIssuanceOfWarrants had a mix of decimals attribute values: -6 -3. Element us-gaap_ProceedsFromRepurchaseOfRedeemablePreferredStock had a mix of decimals attribute values: -6 -3. Element us-gaap_ProceedsFromSaleOfEquityMethodInvestments had a mix of decimals attribute values: -8 -3. Element us-gaap_ProceedsFromSaleOfIntangibleAssets had a mix of decimals attribute values: -6 -3. Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod had a mix of decimals attribute values: -6 -3. 'Monetary' elements on report '1049 - Disclosure - Company and Summary of Significant Accounting Policies - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1054 - Disclosure - Investment and Fair Value Measurements - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1070 - Disclosure - Acquisitions - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1082 - Disclosure - Investments in Equity Interests - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1087 - Disclosure - Derivative Financial Instruments - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1088 - Disclosure - Foreign Currency Forward Contracts Activity (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1091 - Disclosure - Convertible Notes - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1092 - Disclosure - Schedule of Notes (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1095 - Disclosure - Commitments and Contingencies - Additional Information (Detail)' had a mix of different decimal attribute values. 'Shares' elements on report '1098 - Disclosure - Stockholders' Equity - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1098 - Disclosure - Stockholders' Equity - Additional Information (Detail)' had a mix of different decimal attribute values. 'Shares' elements on report '1099 - Disclosure - Employee Benefits - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1099 - Disclosure - Employee Benefits - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1106 - Disclosure - Restructuring Charges Net - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1114 - Disclosure - Income Taxes - Additional Information (Detail)' had a mix of different decimal attribute values. 'Monetary' elements on report '1126 - Disclosure - Selected Quarterly Financial Data (Parenthetical) (Detail)' had a mix of different decimal attribute values. Process Flow-Through: 1003 - Statement - Consolidated Balance Sheets Process Flow-Through: Removing column 'Dec. 31, 2011' Process Flow-Through: Removing column 'Dec. 31, 2010' Process Flow-Through: 1004 - Statement - Consolidated Balance Sheets (Parenthetical) Process Flow-Through: 1005 - Statement - Consolidated Statements of Income Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2013' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2013' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2013' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2013' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2012' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2012' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2012' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2012' Process Flow-Through: 1006 - Statement - Consolidated Statements of Comprehensive Income Process Flow-Through: 1007 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) Process Flow-Through: 1009 - Statement - Consolidated Statements of Cash Flows Process Flow-Through: 1010 - Statement - Consolidated Statements of Cash Flows (Parenthetical) yhoo-20131231.xml yhoo-20131231.xsd yhoo-20131231_cal.xml yhoo-20131231_def.xml yhoo-20131231_lab.xml yhoo-20131231_pre.xml true true