3.19.1 html 74 191 1 true 29 0 false 5 false false R1.htm 100000 - Document - Document and Entity Information Sheet http://www.cars.com/20190331/taxonomy/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 100010 - Statement - Consolidated Balance Sheets Sheet http://www.cars.com/20190331/taxonomy/role/StatementConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 100020 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.cars.com/20190331/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 100030 - Statement - Consolidated Statements of (Loss) Income Sheet http://www.cars.com/20190331/taxonomy/role/StatementConsolidatedStatementsOfLossIncome Consolidated Statements of (Loss) Income Statements 4 false false R5.htm 100040 - Statement - Consolidated Statements of Stockholders' Equity Sheet http://www.cars.com/20190331/taxonomy/role/StatementConsolidatedStatementsOfStockholdersEquity Consolidated Statements of Stockholders' Equity Statements 5 false false R6.htm 100050 - Statement - Consolidated Statements of Comprehensive (Loss) Income Sheet http://www.cars.com/20190331/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveLossIncome Consolidated Statements of Comprehensive (Loss) Income Statements 6 false false R7.htm 100060 - Statement - Consolidated Statements of Cash Flows Sheet http://www.cars.com/20190331/taxonomy/role/StatementConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 7 false false R8.htm 100070 - Disclosure - Description of Business, Company History and Summary of Significant Accounting Policies Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureDescriptionOfBusinessCompanyHistoryAndSummaryOfSignificantAccountingPolicies Description of Business, Company History and Summary of Significant Accounting Policies Notes 8 false false R9.htm 100080 - Disclosure - Recent Accounting Pronouncements Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureRecentAccountingPronouncements Recent Accounting Pronouncements Notes 9 false false R10.htm 100090 - Disclosure - Revenues Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureRevenues Revenues Notes 10 false false R11.htm 100100 - Disclosure - Debt Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureDebt Debt Notes 11 false false R12.htm 100110 - Disclosure - Interest Rate Swap Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureInterestRateSwap Interest Rate Swap Notes 12 false false R13.htm 100120 - Disclosure - Unfavorable Contracts Liability Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureUnfavorableContractsLiability Unfavorable Contracts Liability Notes 13 false false R14.htm 100130 - Disclosure - Commitments and Contingencies Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureCommitmentsAndContingencies Commitments and Contingencies Notes 14 false false R15.htm 100140 - Disclosure - Stockholders??? Equity Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureStockholdersEquity Stockholders??? Equity Notes 15 false false R16.htm 100150 - Disclosure - Stock-Based Compensation Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureStockBasedCompensation Stock-Based Compensation Notes 16 false false R17.htm 100160 - Disclosure - (Loss) Earnings Per Share Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureLossEarningsPerShare (Loss) Earnings Per Share Notes 17 false false R18.htm 100170 - Disclosure - Leases Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureLeases Leases Notes 18 false false R19.htm 100180 - Disclosure - Description of Business, Company History and Summary of Significant Accounting Policies (Policies) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureDescriptionOfBusinessCompanyHistoryAndSummaryOfSignificantAccountingPoliciesPolicies Description of Business, Company History and Summary of Significant Accounting Policies (Policies) Policies http://www.cars.com/20190331/taxonomy/role/DisclosureDescriptionOfBusinessCompanyHistoryAndSummaryOfSignificantAccountingPolicies 19 false false R20.htm 100190 - Disclosure - Description of Business, Company History and Summary of Significant Accounting Policies (Tables) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureDescriptionOfBusinessCompanyHistoryAndSummaryOfSignificantAccountingPoliciesTables Description of Business, Company History and Summary of Significant Accounting Policies (Tables) Tables http://www.cars.com/20190331/taxonomy/role/DisclosureDescriptionOfBusinessCompanyHistoryAndSummaryOfSignificantAccountingPolicies 20 false false R21.htm 100200 - Disclosure - Revenues (Tables) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureRevenuesTables Revenues (Tables) Tables http://www.cars.com/20190331/taxonomy/role/DisclosureRevenues 21 false false R22.htm 100210 - Disclosure - Unfavorable Contracts Liability (Tables) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureUnfavorableContractsLiabilityTables Unfavorable Contracts Liability (Tables) Tables http://www.cars.com/20190331/taxonomy/role/DisclosureUnfavorableContractsLiability 22 false false R23.htm 100220 - Disclosure - (Loss) Earnings Per Share (Tables) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureLossEarningsPerShareTables (Loss) Earnings Per Share (Tables) Tables http://www.cars.com/20190331/taxonomy/role/DisclosureLossEarningsPerShare 23 false false R24.htm 100230 - Disclosure - Leases (Tables) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureLeasesTables Leases (Tables) Tables http://www.cars.com/20190331/taxonomy/role/DisclosureLeases 24 false false R25.htm 100240 - Disclosure - Description of Business, Company History and Summary of Significant Accounting Policies - Additional Information (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureDescriptionOfBusinessCompanyHistoryAndSummaryOfSignificantAccountingPoliciesAdditionalInformationDetails Description of Business, Company History and Summary of Significant Accounting Policies - Additional Information (Details) Details 25 false false R26.htm 100250 - Disclosure - Description of Business, Company History and Summary of Significant Accounting Policies - Summary of Reclassification of Prior Year Balances (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureDescriptionOfBusinessCompanyHistoryAndSummaryOfSignificantAccountingPoliciesSummaryOfReclassificationOfPriorYearBalancesDetails Description of Business, Company History and Summary of Significant Accounting Policies - Summary of Reclassification of Prior Year Balances (Details) Details 26 false false R27.htm 100260 - Disclosure - Recent Accounting Pronouncements - Additional Information (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureRecentAccountingPronouncementsAdditionalInformationDetails Recent Accounting Pronouncements - Additional Information (Details) Details 27 false false R28.htm 100270 - Disclosure - Revenues - Additional Information (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureRevenuesAdditionalInformationDetails Revenues - Additional Information (Details) Details 28 false false R29.htm 100280 - Disclosure - Revenues - Summary of Revenue Disaggregated by Sales Channel and Major Products and Services (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureRevenuesSummaryOfRevenueDisaggregatedBySalesChannelAndMajorProductsAndServicesDetails Revenues - Summary of Revenue Disaggregated by Sales Channel and Major Products and Services (Details) Details 29 false false R30.htm 100290 - Disclosure - Debt - Additional Information (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureDebtAdditionalInformationDetails Debt - Additional Information (Details) Details 30 false false R31.htm 100300 - Disclosure - Interest Rate Swap - Additional Information (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureInterestRateSwapAdditionalInformationDetails Interest Rate Swap - Additional Information (Details) Details 31 false false R32.htm 100310 - Disclosure - Unfavorable Contracts Liability - Additional Information (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureUnfavorableContractsLiabilityAdditionalInformationDetails Unfavorable Contracts Liability - Additional Information (Details) Details 32 false false R33.htm 100320 - Disclosure - Unfavorable Contracts Liability - Summary of Unfavorable Contracts Liability Activity (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureUnfavorableContractsLiabilitySummaryOfUnfavorableContractsLiabilityActivityDetails Unfavorable Contracts Liability - Summary of Unfavorable Contracts Liability Activity (Details) Details 33 false false R34.htm 100330 - Disclosure - Stockholders' Equity - Additional Information (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetails Stockholders' Equity - Additional Information (Details) Details 34 false false R35.htm 100340 - Disclosure - Stock-Based Compensation - Additional Information (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetails Stock-Based Compensation - Additional Information (Details) Details 35 false false R36.htm 100350 - Disclosure - (Loss) Earnings Per Share - Computation of (Loss) Earnings Per Share (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureLossEarningsPerShareComputationOfLossEarningsPerShareDetails (Loss) Earnings Per Share - Computation of (Loss) Earnings Per Share (Details) Details 36 false false R37.htm 100360 - Disclosure - (Loss) Earnings Per Share - Computation of (Loss) Earnings Per Share (Parenthetical) (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureLossEarningsPerShareComputationOfLossEarningsPerShareParentheticalDetails (Loss) Earnings Per Share - Computation of (Loss) Earnings Per Share (Parenthetical) (Details) Details 37 false false R38.htm 100370 - Disclosure - Leases - Scheduled Future Minimum Lease Payments Under Operating Leases (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureLeasesScheduledFutureMinimumLeasePaymentsUnderOperatingLeasesDetails Leases - Scheduled Future Minimum Lease Payments Under Operating Leases (Details) Details 38 false false R39.htm 100390 - Disclosure - Leases - Additional Information (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureLeasesAdditionalInformationDetails Leases - Additional Information (Details) Details 39 false false R40.htm 100400 - Disclosure - Leases - Other Information Related to Operating Leases (Details) Sheet http://www.cars.com/20190331/taxonomy/role/DisclosureLeasesOtherInformationRelatedToOperatingLeasesDetails Leases - Other Information Related to Operating Leases (Details) Details 40 false false All Reports Book All Reports cars-20190331.xml cars-20190331.xsd cars-20190331_cal.xml cars-20190331_def.xml cars-20190331_lab.xml cars-20190331_pre.xml http://fasb.org/us-gaap/2018-01-31 http://fasb.org/srt/2018-01-31 http://xbrl.sec.gov/dei/2018-01-31 http://xbrl.sec.gov/invest/2013-01-31 true true