<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Version>2.4.0.8</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>648</ContextCount>
  <ElementCount>624</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>245</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>21</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - Consolidated Statements of Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ConsolidatedStatementsOfIncome</Role>
      <ShortName>Consolidated Statements of Income</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1002000 - Statement - Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ConsolidatedStatementsOfComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1003000 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003001 - Statement - Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ConsolidatedBalanceSheetsCondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1004000 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1005000 - Statement - Consolidated Statements of Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ConsolidatedStatementsOfEquity</Role>
      <ShortName>Consolidated Statements of Equity</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - Background and Basis of Presentation (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/BackgroundAndBasisOfPresentationNotes</Role>
      <ShortName>Background and Basis of Presentation (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2102100 - Disclosure - Significant Accounting Policies (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesNotes</Role>
      <ShortName>Significant Accounting Policies (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2103100 - Disclosure - Acquisitions (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/AcquisitionsNotes</Role>
      <ShortName>Acquisitions (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2104100 - Disclosure - Related Party Transactions (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/RelatedPartyTransactionsNotes</Role>
      <ShortName>Related Party Transactions (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2105100 - Disclosure - Discontinued Operations (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/DiscontinuedOperationsNotes</Role>
      <ShortName>Discontinued Operations (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2105100 - Disclosure - Investments in Affiliates (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/InvestmentsInAffiliatesNotes</Role>
      <ShortName>Investments in Affiliates (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2106100 - Disclosure - Uncompleted Contracts (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/UncompletedContractsNotes</Role>
      <ShortName>Uncompleted Contracts (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2107100 - Disclosure - Property (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/PropertyNotes</Role>
      <ShortName>Property (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2108100 - Disclosure - Notes Payable and Long-Term Debt (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/NotesPayableAndLongTermDebtNotes</Role>
      <ShortName>Notes Payable and Long-Term Debt (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2109100 - Disclosure - Leases-Company as Lessee (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/LeasesCompanyAsLesseeNotes</Role>
      <ShortName>Leases-Company as Lessee (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2110100 - Disclosure - Leases-Company as Lessor (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/LeasesCompanyAsLessorNotes</Role>
      <ShortName>Leases-Company as Lessor (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2111100 - Disclosure - Employee Benefit Plans (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansNotes</Role>
      <ShortName>Employee Benefit Plans (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2112100 - Disclosure - Income Taxes (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/IncomeTaxesNotes</Role>
      <ShortName>Income Taxes (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2113100 - Disclosure - Share-Based Awards (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ShareBasedAwardsNotes</Role>
      <ShortName>Share-Based Awards (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2115100 - Disclosure - Commitments and Contingencies (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/CommitmentsAndContingenciesNotes</Role>
      <ShortName>Commitments and Contingencies (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2116100 - Disclosure - Derivative Instruments (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/DerivativeInstrumentsNotes</Role>
      <ShortName>Derivative Instruments (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2117100 - Disclosure - Segment Results (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SegmentResultsNotes</Role>
      <ShortName>Segment Results (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>218100 - Schedule - Schedule III - Real Estate and Accumulated Depreciation Schedule III-Real Estate and Accumulated Depreciation (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ScheduleIiiRealEstateAndAccumulatedDepreciationScheduleIiiRealEstateAndAccumulatedDepreciationNotes</Role>
      <ShortName>Schedule III - Real Estate and Accumulated Depreciation Schedule III-Real Estate and Accumulated Depreciation (Notes)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2202201 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesPolicies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2302302 - Disclosure - Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesTables</Role>
      <ShortName>Significant Accounting Policies (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2303301 - Disclosure - Acquisitions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/AcquisitionsTables</Role>
      <ShortName>Acquisitions (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2304301 - Disclosure - Related Party Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/RelatedPartyTransactionsTables</Role>
      <ShortName>Related Party Transactions (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - Discontinued Operations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/DiscontinuedOperationsTables</Role>
      <ShortName>Discontinued Operations (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - Investments in Affiliates (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/InvestmentsInAffiliatesTables</Role>
      <ShortName>Investments in Affiliates (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2306301 - Disclosure - Uncompleted Contracts (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/UncompletedContractsTables</Role>
      <ShortName>Uncompleted Contracts (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2307301 - Disclosure - Property (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/PropertyTables</Role>
      <ShortName>Property (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2308301 - Disclosure - Notes Payable and Long-Term Debt (Tables)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/NotesPayableAndLongTermDebtTables</Role>
      <ShortName>Notes Payable and Long-Term Debt (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2309301 - Disclosure - Leases-Company as Lessee (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/LeasesCompanyAsLesseeTables</Role>
      <ShortName>Leases-Company as Lessee (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2310301 - Disclosure - Leases-Company as Lessor (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/LeasesCompanyAsLessorTables</Role>
      <ShortName>Leases-Company as Lessor (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2311301 - Disclosure - Employee Benefit Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansTables</Role>
      <ShortName>Employee Benefit Plans (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2312301 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2313301 - Disclosure - Share-Based Awards (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ShareBasedAwardsTables</Role>
      <ShortName>Share-Based Awards (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2315301 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/CommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2316301 - Disclosure - Derivative Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/DerivativeInstrumentsTables</Role>
      <ShortName>Derivative Instruments (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2317301 - Disclosure - Segment Results (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SegmentResultsTables</Role>
      <ShortName>Segment Results (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2401401 - Disclosure - Background and Basis of Presentation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/BackgroundAndBasisOfPresentationDetails</Role>
      <ShortName>Background and Basis of Presentation (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2402403 - Disclosure - Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesDetails</Role>
      <ShortName>Significant Accounting Policies (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2402404 - Disclosure - Significant Accounting Policies - Allowance for Doubtful Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesAllowanceForDoubtfulAccountsDetails</Role>
      <ShortName>Significant Accounting Policies - Allowance for Doubtful Accounts (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2402405 - Disclosure - Significant Accounting Policies - Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesInventoriesDetails</Role>
      <ShortName>Significant Accounting Policies - Inventories (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2402406 - Disclosure - Significant Accounting Policies - Estimated Useful Lives of Property (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesEstimatedUsefulLivesOfPropertyDetails</Role>
      <ShortName>Significant Accounting Policies - Estimated Useful Lives of Property (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2402407 - Disclosure - Significant Accounting Policies - Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesIntangibleAssetsDetails</Role>
      <ShortName>Significant Accounting Policies - Intangible Assets (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2402408 - Disclosure - Significant Accounting Policies - Estimated Future Amortization Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesEstimatedFutureAmortizationExpensesDetails</Role>
      <ShortName>Significant Accounting Policies - Estimated Future Amortization Expenses (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2402409 - Disclosure - Significant Accounting Policies - Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesGoodwillDetails</Role>
      <ShortName>Significant Accounting Policies - Goodwill (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2402410 - Disclosure - Significant Accounting Policies - Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesEarningsPerShareDetails</Role>
      <ShortName>Significant Accounting Policies - Earnings Per Share (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2402411 - Disclosure - Significant Accounting Policies - Components of Accumulated Other Comprehensive Income (Loss) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SignificantAccountingPoliciesComponentsOfAccumulatedOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>Significant Accounting Policies - Components of Accumulated Other Comprehensive Income (Loss) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2403402 - Disclosure - Acquisitions - Grace Acquisition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/AcquisitionsGraceAcquisitionDetails</Role>
      <ShortName>Acquisitions - Grace Acquisition (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2403403 - Disclosure - Acquisitions - Kailua Portfolio Acquisition(Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/AcquisitionsKailuaPortfolioAcquisitiondetails</Role>
      <ShortName>Acquisitions - Kailua Portfolio Acquisition(Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2403404 - Disclosure - Acquisitions - Other Acquisitions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/AcquisitionsOtherAcquisitionsDetails</Role>
      <ShortName>Acquisitions - Other Acquisitions (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2404402 - Disclosure - Related Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/RelatedPartyTransactionsDetails</Role>
      <ShortName>Related Party Transactions (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2405402 - Disclosure - Discontinued Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/DiscontinuedOperationsDetails</Role>
      <ShortName>Discontinued Operations (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2405402 - Disclosure - Investments in Affiliates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/InvestmentsInAffiliatesDetails</Role>
      <ShortName>Investments in Affiliates (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2405403 - Disclosure - Investments in Affiliates - Financial Information for Equity Method Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/InvestmentsInAffiliatesFinancialInformationForEquityMethodInvestmentsDetails</Role>
      <ShortName>Investments in Affiliates - Financial Information for Equity Method Investments (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2405404 - Disclosure - Investments in Affiliates - Assets Measured at Fair Value on Nonrecurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/InvestmentsInAffiliatesAssetsMeasuredAtFairValueOnNonrecurringBasisDetails</Role>
      <ShortName>Investments in Affiliates - Assets Measured at Fair Value on Nonrecurring Basis (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2406402 - Disclosure - Uncompleted Contracts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/UncompletedContractsDetails</Role>
      <ShortName>Uncompleted Contracts (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2407402 - Disclosure - Property (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/PropertyDetails</Role>
      <ShortName>Property (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2408402 - Disclosure - Notes Payable and Long-Term Debt (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/NotesPayableAndLongTermDebtDetails</Role>
      <ShortName>Notes Payable and Long-Term Debt (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2408403 - Disclosure - Notes Payable and Long-Term Debt - Long-term Debt Maturities (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/NotesPayableAndLongTermDebtLongTermDebtMaturitiesDetails</Role>
      <ShortName>Notes Payable and Long-Term Debt - Long-term Debt Maturities (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2408404 - Disclosure - Notes Payable and Long-Term Debt - Revolving Credit Facilities (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/NotesPayableAndLongTermDebtRevolvingCreditFacilitiesDetails</Role>
      <ShortName>Notes Payable and Long-Term Debt - Revolving Credit Facilities (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2408405 - Disclosure - Notes Payable and Long-Term Debt - Real Estate Secured Term Debt (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/NotesPayableAndLongTermDebtRealEstateSecuredTermDebtDetails</Role>
      <ShortName>Notes Payable and Long-Term Debt - Real Estate Secured Term Debt (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2409402 - Disclosure - Leases-Company as Lessee (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/LeasesCompanyAsLesseeDetails</Role>
      <ShortName>Leases-Company as Lessee (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2410402 - Disclosure - Leases-Company as Lessor - Historical Cost and Accumulated Depreciation of Leases Property (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/LeasesCompanyAsLessorHistoricalCostAndAccumulatedDepreciationOfLeasesPropertyDetails</Role>
      <ShortName>Leases-Company as Lessor - Historical Cost and Accumulated Depreciation of Leases Property (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2410403 - Disclosure - Leases-Company as Lessor - Schedule of Rental Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/LeasesCompanyAsLessorScheduleOfRentalIncomeDetails</Role>
      <ShortName>Leases-Company as Lessor - Schedule of Rental Income (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2410404 - Disclosure - Leases-Company as Lessor  - Future Minimum Payments Receivable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/LeasesCompanyAsLessorFutureMinimumPaymentsReceivableDetails</Role>
      <ShortName>Leases-Company as Lessor  - Future Minimum Payments Receivable (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2411402 - Disclosure - Employee Benefit Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansDetails</Role>
      <ShortName>Employee Benefit Plans (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2411403 - Disclosure - Employee Benefit Plans  - Plan Asset Allocations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansPlanAssetAllocationsDetails</Role>
      <ShortName>Employee Benefit Plans  - Plan Asset Allocations (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2411404 - Disclosure - Employee Benefit Plans  - Fair Value of Pension Plan Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansFairValueOfPensionPlanAssetsDetails</Role>
      <ShortName>Employee Benefit Plans  - Fair Value of Pension Plan Assets (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2411405 - Disclosure - Employee Benefit Plans  - Reconciliation of Pension Plan Investments Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansReconciliationOfPensionPlanInvestmentsMeasuredAtFairValueOnRecurringBasisUsingSignificantUnobservableInputsDetails</Role>
      <ShortName>Employee Benefit Plans  - Reconciliation of Pension Plan Investments Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2411406 - Disclosure - Employee Benefit Plans  - Benefit Obligation, Plan Assets, and Funded Status (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansBenefitObligationPlanAssetsAndFundedStatusDetails</Role>
      <ShortName>Employee Benefit Plans  - Benefit Obligation, Plan Assets, and Funded Status (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2411407 - Disclosure - Employee Benefit Plans  - Amounts Recognized in Consolidated Balance Sheets and Accumulated Other Comprehensive Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansAmountsRecognizedInConsolidatedBalanceSheetsAndAccumulatedOtherComprehensiveLossDetails</Role>
      <ShortName>Employee Benefit Plans  - Amounts Recognized in Consolidated Balance Sheets and Accumulated Other Comprehensive Loss (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2411408 - Disclosure - Employee Benefit Plans  - Accumulated Benefit Obligation in Excess of Plan Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansAccumulatedBenefitObligationInExcessOfPlanAssetsDetails</Role>
      <ShortName>Employee Benefit Plans  - Accumulated Benefit Obligation in Excess of Plan Assets (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2411409 - Disclosure - Employee Benefit Plans  - Net Periodic Benefit Cost and Amounts Recognized in Other Comprehensive Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostAndAmountsRecognizedInOtherComprehensiveLossDetails</Role>
      <ShortName>Employee Benefit Plans  - Net Periodic Benefit Cost and Amounts Recognized in Other Comprehensive Loss (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2411410 - Disclosure - Employee Benefit Plans  - Weighted-Average Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansWeightedAverageAssumptionsDetails</Role>
      <ShortName>Employee Benefit Plans  - Weighted-Average Assumptions (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2411411 - Disclosure - Employee Benefit Plans  - Assumed Health Care Cost Trend Rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansAssumedHealthCareCostTrendRatesDetails</Role>
      <ShortName>Employee Benefit Plans  - Assumed Health Care Cost Trend Rates (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2411412 - Disclosure - Employee Benefit Plans - Estimated Benefit Payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansEstimatedBenefitPaymentsDetails</Role>
      <ShortName>Employee Benefit Plans - Estimated Benefit Payments (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>2411413 - Disclosure - Employee Benefit Plans - Multiemployer Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/EmployeeBenefitPlansMultiemployerPlanDetails</Role>
      <ShortName>Employee Benefit Plans - Multiemployer Plan (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>2412402 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>2412403 - Disclosure - Income Taxes - Income Tax from Continuing Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/IncomeTaxesIncomeTaxFromContinuingOperationsDetails</Role>
      <ShortName>Income Taxes - Income Tax from Continuing Operations (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>2412404 - Disclosure - Income Taxes - Income Tax Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/IncomeTaxesIncomeTaxReconciliationDetails</Role>
      <ShortName>Income Taxes - Income Tax Reconciliation (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>2412405 - Disclosure - Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/IncomeTaxesDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails</Role>
      <ShortName>Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>2412406 - Disclosure - Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/IncomeTaxesReconciliationOfUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>2413402 - Disclosure - Share-Based Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ShareBasedAwardsDetails</Role>
      <ShortName>Share-Based Awards (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>2413403 - Disclosure - Share-Based Awards - Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ShareBasedAwardsStockOptionActivityDetails</Role>
      <ShortName>Share-Based Awards - Stock Option Activity (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>2413404 - Disclosure - Share-Based Awards - Nonvested Restricted Stock Unit Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ShareBasedAwardsNonvestedRestrictedStockUnitActivityDetails</Role>
      <ShortName>Share-Based Awards - Nonvested Restricted Stock Unit Activity (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>2413405 - Disclosure - Share-Based Awards - Summary of Compensation Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ShareBasedAwardsSummaryOfCompensationCostsDetails</Role>
      <ShortName>Share-Based Awards - Summary of Compensation Costs (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>2415402 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/CommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>2416402 - Disclosure - Derivative Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/DerivativeInstrumentsDetails</Role>
      <ShortName>Derivative Instruments (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>2417402 - Disclosure - Segment Results (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SegmentResultsDetails</Role>
      <ShortName>Segment Results (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>2417403 - Disclosure - Segment Results - Operating Segment Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/SegmentResultsOperatingSegmentInformationDetails</Role>
      <ShortName>Segment Results - Operating Segment Information (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>248401 - Schedule - Schedule III - Real Estate and Accumulated Depreciation Schedule III-Real Estate and Accumulated Depreciation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alexanderbaldwin.com/role/ScheduleIiiRealEstateAndAccumulatedDepreciationScheduleIiiRealEstateAndAccumulatedDepreciationDetails</Role>
      <ShortName>Schedule III - Real Estate and Accumulated Depreciation Schedule III-Real Estate and Accumulated Depreciation (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Info">Element alex_ConversionOfParentInvestmentInSubsidiaryToSubsidiaryEquityInSpinOff had a mix of decimals attribute values: -6 -5.</Log>
    <Log type="Info">Element us-gaap_DebtInstrumentFaceAmount had a mix of decimals attribute values: -6 -5.</Log>
    <Log type="Info">Element us-gaap_DebtInstrumentInterestRateStatedPercentage had a mix of decimals attribute values: 0 3.</Log>
    <Log type="Info">Element us-gaap_PaymentsToAcquireBusinessesGross had a mix of decimals attribute values: -5 -4.</Log>
    <Log type="Info">Element us-gaap_RealEstateOtherDeductions had a mix of decimals attribute values: -6 -5.</Log>
    <Log type="Info">'Monetary' elements on report '2408405 - Disclosure - Notes Payable and Long-Term Debt - Real Estate Secured Term Debt (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '2411402 - Disclosure - Employee Benefit Plans (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '2415402 - Disclosure - Commitments and Contingencies (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '2416402 - Disclosure - Derivative Instruments (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">Process Flow-Through: 1001000 - Statement - Consolidated Statements of Income</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Dec. 31, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Sep. 30, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Mar. 31, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Dec. 31, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Sep. 30, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Mar. 31, 2012'</Log>
    <Log type="Info">Process Flow-Through: 1002000 - Statement - Consolidated Statements of Comprehensive Income</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Dec. 31, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Sep. 30, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Mar. 31, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Dec. 31, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Sep. 30, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Mar. 31, 2012'</Log>
    <Log type="Info">Process Flow-Through: 1003000 - Statement - Consolidated Balance Sheets</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2010'</Log>
    <Log type="Info">Process Flow-Through: 1003001 - Statement - Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 1004000 - Statement - Consolidated Statements of Cash Flows</Log>
  </Logs>
  <InputFiles>
    <File>alex-20131231.xml</File>
    <File>alex-20131231.xsd</File>
    <File>alex-20131231_cal.xml</File>
    <File>alex-20131231_def.xml</File>
    <File>alex-20131231_lab.xml</File>
    <File>alex-20131231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
