2.2.0.25truefalse4040 - Disclosure - Real Estate Acquisitions, Disposals, and Impairment (Details)truefalseShare data in Millions, unless otherwise specifiedfalse1falsefalseUSDfalsefalse1/1/2008 - 1/31/2008 USD ($) $D2008Q1_M0102http://www.sec.gov/CIK0001063761duration2008-01-01T00:00:002008-01-31T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $D2010http://www.sec.gov/CIK0001063761duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$3falsefalseUSDfalsefalse1/1/2009 - 12/31/2009 USD ($) USD ($) / shares $D2009http://www.sec.gov/CIK0001063761duration2009-01-01T00:00:002009-12-31T00:00:00SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$4falsefalseUSDfalsefalse1/1/2008 - 12/31/2008 USD ($) USD ($) / shares $D2008http://www.sec.gov/CIK0001063761duration2008-01-01T00:00:002008-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$5falsefalsefalsefalse5/28/2010 I2010Q2_M0528http://www.sec.gov/CIK0001063761instant2010-05-28T00:00:000001-01-01T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli06falsefalsefalsefalse1/2/2008 I2008Q1_M0102http://www.sec.gov/CIK0001063761instant2008-01-02T00:00:000001-01-01T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli07falsefalseUSDtruefalse{spg_RealEstateAcquisitionsAndDispositionsAxis} : Regional Malls 1/1/2010 - 12/31/2010 USD ($) $D2010_RegionalMallsMemberhttp://www.sec.gov/CIK0001063761duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseRegional Mallsspg_RealEstateAcquisitionsAndDispositionsAxisxbrldihttp://xbrl.org/2006/xbrldispg_RegionalMallsMemberspg_RealEstateAcquisitionsAndDispositionsAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$8falsefalseUSDtruefalse{spg_RealEstateAcquisitionsAndDispositionsAxis} : Regional Malls 1/1/2008 - 12/31/2008 USD ($) $D2008_RegionalMallsMemberhttp://www.sec.gov/CIK0001063761duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseRegional Mallsspg_RealEstateAcquisitionsAndDispositionsAxisxbrldihttp://xbrl.org/2006/xbrldispg_RegionalMallsMemberspg_RealEstateAcquisitionsAndDispositionsAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9falsefalsetruefalse{spg_RealEstateAcquisitionsAndDispositionsAxis} : Community/Lifestyle Centers 1/1/2010 - 12/31/2010 D2010_CommunityLifestyleCentersMemberhttp://www.sec.gov/CIK0001063761duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseCommunity/Lifestyle Centersspg_RealEstateAcquisitionsAndDispositionsAxisxbrldihttp://xbrl.org/2006/xbrldispg_CommunityLifestyleCentersMemberspg_RealEstateAcquisitionsAndDispositionsAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli010falsefalsetruefalse{spg_RealEstateAcquisitionsAndDispositionsAxis} : Other Retail Property 1/1/2010 - 12/31/2010 D2010_OtherRetailPropertyMemberhttp://www.sec.gov/CIK0001063761duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOther Retail Propertyspg_RealEstateAcquisitionsAndDispositionsAxisxbrldihttp://xbrl.org/2006/xbrldispg_OtherRetailPropertyMemberspg_RealEstateAcquisitionsAndDispositionsAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli011falsefalsetruefalse{spg_RealEstateAcquisitionsAndDispositionsAxis} : Prime Outlets Acquisition Company and Affiliated Entities 8/1/2010 - 8/31/2010 D2010Q3_M08_PrimeOutletsAcquisitionCompanyAndAffiliatedEntitiesMemberhttp://www.sec.gov/CIK0001063761duration2010-08-01T00:00:002010-08-31T00:00:00falsefalsePrime Outlets Acquisition Company and Affiliated Entitiesspg_RealEstateAcquisitionsAndDispositionsAxisxbrldihttp://xbrl.org/2006/xbrldispg_PrimeOutletsAcquisitionCompanyAndAffiliatedEntitiesMemberspg_RealEstateAcquisitionsAndDispositionsAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli012falsefalseUSDtruefalse{spg_RealEstateAcquisitionsAndDispositionsAxis} : Prime Outlets Acquisition Company and Affiliated Entities 1/1/2010 - 12/31/2010 USD ($) $D2010_PrimeOutletsAcquisitionCompanyAndAffiliatedEntitiesMemberhttp://www.sec.gov/CIK0001063761duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePrime Outlets Acquisition Company and Affiliated Entitiesspg_RealEstateAcquisitionsAndDispositionsAxisxbrldihttp://xbrl.org/2006/xbrldispg_PrimeOutletsAcquisitionCompanyAndAffiliatedEntitiesMemberspg_RealEstateAcquisitionsAndDispositionsAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$13falsefalsetruefalse{spg_RealEstateAcquisitionsAndDispositionsAxis} : Puerto Rico Premium Outlets 5/1/2010 - 5/31/2010 D2010Q2_M05_PuertoRicoMemberhttp://www.sec.gov/CIK0001063761duration2010-05-01T00:00:002010-05-31T00:00:00falsefalsePuerto Rico Premium Outletsspg_RealEstateAcquisitionsAndDispositionsAxisxbrldihttp://xbrl.org/2006/xbrldispg_PuertoRicoMemberspg_RealEstateAcquisitionsAndDispositionsAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli014falsefalseUSDtruefalse{us-gaap_LongtermDebtTypeAxis} : Unsecured Debt {us-gaap_DebtInstrumentAxis} : Credit Facility 12/31/2010 USD ($) $I2010_LineOfCreditMember_UnsecuredDebtMemberhttp://www.sec.gov/CIK0001063761instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseUnsecured Debtus-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnsecuredDebtMemberus-gaap_LongtermDebtTypeAxisexplicitMemberfalsefalseCredit Facilityus-gaap_DebtInstrumentAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LineOfCreditMemberus-gaap_DebtInstrumentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$15falsefalseUSDtruefalse{us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis} : Sale of Consolidated Properties 1/1/2010 - 12/31/2010 USD ($) $D2010_SaleOfConsolidatedPropertiesMemberhttp://www.sec.gov/CIK0001063761duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseSale of Consolidated Propertiesus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisxbrldihttp://xbrl.org/2006/xbrldispg_SaleOfConsolidatedPropertiesMemberus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$16falsefalseUSDtruefalse{us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis} : Sale of Consolidated Properties 1/1/2009 - 12/31/2009 USD ($) $D2009_SaleOfConsolidatedPropertiesMemberhttp://www.sec.gov/CIK0001063761duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseSale of Consolidated Propertiesus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisxbrldihttp://xbrl.org/2006/xbrldispg_SaleOfConsolidatedPropertiesMemberus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2true0spg_RealEstateAcquisitionsAndDispositionsLineItemsspgfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseReal Estate Acquisitions and Dispositions3false0spg_NumberOfPropertiesDisposedspgfalsenadurationThis element represents the number of properties that are disposed during the period by the entity.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7truefalsefalse11falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9truefalsefalse11falsefalsefalsetruefalse10truefalsefalse22falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerThis element represents the number of properties that are disposed during the period by the entity.No authoritative reference available.falsefalseNumber of properties disposed4false0spg_ProceedsFromSaleOfPartnershipInterestsOtherAssetsAndDiscontinuedOperationsNetspgfalsedebitdurationCash inflows from the sale of partnership interests, other assets, and discontinued operations.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse301425000301425000falsetruefalsefalsefalse3truefalsefalse3310600033106000falsetruefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15truefalsefalse58000005800000falsetruefalsetruefalse16truefalsefalse39000003900000falsetruefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryCash inflows from the sale of partnership interests, other assets, and discontinued operations.No authoritative reference available.falsefalseNet proceeds from sale of assets and interest in unconsolidated entities5false0spg_AcquisitionOfControllingInterestSaleOrDisposalOfAssetsAndInterestsInUnconsolidatedEntitiesGainOrLossCashFlowspgfalsecreditdurationIn a business combination achieved in stages, this element represents the cash flow effect of the amount of gain or loss...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse321036000321036000falsefalsefalsefalsefalse3truefalsefalse-30108000-30108000falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16truefalsefalse-9800000-9800000falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryIn a business combination achieved in stages, this element represents the cash flow effect of the amount of gain or loss recognized by the entity as a result of re-measuring to fair value the equity interest in the acquiree it held before the business combination. Also includes the difference between the carrying value and the sales price for consolidated investment property and equity method investments.No authoritative reference available.falsefalseGain (loss) upon acquisition of controlling interest, and on sale or disposal of assets and interests in unconsolidated entities, net6false0spg_GainLossDueToAcquisitionOfControllingInterestspgfalsecreditdurationThis element represents the gain/ (loss) due to acquisition of controlling interest, which resulted in a remeasurement of...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7truefalsefalse1300000013000000falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15truefalsefalse57000005700000falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the gain/ (loss) due to acquisition of controlling interest, which resulted in a remeasurement of previously held equity interest to fair value.No authoritative reference available.falsefalseGain/ (loss) due to acquisition of controlling interest7false0spg_BusinessAcquisitionPercentageOfOwnershipAcquiredspgfalsenainstantThis element represents Percentage of ownership interests acquired in the business combination.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalse4falsetruefalse00falsefalsefalsefalsefalse5truetruefalse0.190.19falsefalsefalsefalsefalse6falsetruefalse00falsefalsefalsefalsefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalse10falsetruefalse00falsefalsefalsetruefalse11falsetruefalse00falsefalsefalsetruefalse12falsetruefalse00falsefalsefalsetruefalse13falsetruefalse00falsefalsefalsetruefalse14falsetruefalse00falsefalsefalsetruefalse15falsetruefalse00falsefalsefalsetruefalse16falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThis element represents Percentage of ownership interests acquired in the business combination.No authoritative reference available.falsefalseAdditional Business Acquisition Percentage of Ownership Acquired (as a percent)8false0spg_BusinessAcquisitionPercentageOfInterestsAcquiredLowEndOfRangespgfalsenadurationThis element represents low end of percentage of ownership interests acquired in the business combination.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.0180.018falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalse4falsetruefalse00falsefalsefalsefalsefalse5falsetruefalse00falsefalsefalsefalsefalse6falsetruefalse00falsefalsefalsefalsefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalse10falsetruefalse00falsefalsefalsetruefalse11falsetruefalse00falsefalsefalsetruefalse12falsetruefalse00falsefalsefalsetruefalse13falsetruefalse00falsefalsefalsetruefalse14falsetruefalse00falsefalsefalsetruefalse15falsetruefalse00falsefalsefalsetruefalse16falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThis element represents low end of percentage of ownership interests acquired in the business combination.No authoritative reference available.falsefalseBusiness Acquisition Percentage of Ownership Acquired, low end of the range (as a percent)9false0spg_BusinessAcquisitionPercentageOfInterestsAcquiredHighEndOfRangespgfalsenadurationThis element represents high end of percentage of ownership interests acquired in the business combination.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.050.05falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalse4falsetruefalse00falsefalsefalsefalsefalse5falsetruefalse00falsefalsefalsefalsefalse6falsetruefalse00falsefalsefalsefalsefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalse10falsetruefalse00falsefalsefalsetruefalse11falsetruefalse00falsefalsefalsetruefalse12falsetruefalse00falsefalsefalsetruefalse13falsetruefalse00falsefalsefalsetruefalse14falsetruefalse00falsefalsefalsetruefalse15falsetruefalse00falsefalsefalsetruefalse16falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThis element represents high end of percentage of ownership interests acquired in the business combination.No authoritative reference available.falsefalseBusiness Acquisition Percentage of Ownership Acquired, high end of the range (as a percent)10false0spg_BusinessAcquisitionPercentageOfInterestsAcquiredspgfalsenainstantThis element represents Percentage of Interests Acquired in Business Acquisition.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalse4falsetruefalse00falsefalsefalsefalsefalse5truetruefalse0.3150.315falsefalsefalsefalsefalse6falsetruefalse00falsefalsefalsefalsefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalse10falsetruefalse00falsefalsefalsetruefalse11falsetruefalse00falsefalsefalsetruefalse12falsetruefalse00falsefalsefalsetruefalse13falsetruefalse00falsefalsefalsetruefalse14falsetruefalse00falsefalsefalsetruefalse15falsetruefalse00falsefalsefalsetruefalse16falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThis element represents Percentage of Interests Acquired in Business Acquisition.No authoritative reference available.falsefalseInitial Investment Percentage of Business Acquired (as a percent)11false0spg_CumulativeInvestmentOwnershipPercentagespgfalsenainstantThis element represents Cumulative investment in ownership.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalse4falsetruefalse00falsefalsefalsefalsefalse5truetruefalse0.5040.504falsefalsefalsefalsefalse6truetruefalse1.001.00falsefalsefalsefalsefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalse10falsetruefalse00falsefalsefalsetruefalse11falsetruefalse00falsefalsefalsetruefalse12falsetruefalse00falsefalsefalsetruefalse13falsetruefalse00falsefalsefalsetruefalse14falsetruefalse00falsefalsefalsetruefalse15falsetruefalse00falsefalsefalsetruefalse16falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThis element represents Cumulative investment in ownership.No authoritative reference available.falsefalseCumulative Investment Ownership Percentage (as a percent)12false0spg_AcquisitionNumberOfPropertiesAcquiredspgfalsenadurationThe number of properties acquired under an acquisition, as of the balance sheet date.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse33falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11truefalsefalse2121falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13truefalsefalse11falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerThe number of properties acquired under an acquisition, as of the balance sheet date.No authoritative reference available.falsefalseAcquisition, number of outlet centers acquired13false0spg_AcquisitionNumberOfPropertiesWithNoncontrollingInterestHolderspgfalsenadurationFollowing an acquisition, the number of properties that continue to have a noncontrolling interest holderfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse22falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerFollowing an acquisition, the number of properties that continue to have a noncontrolling interest holderNo authoritative reference available.falsefalseAcquisition, number of properties with noncontrolling interest holder14false0spg_NumberOfLandParcelsWrittenDownspgfalsenadurationFollowing an acquisition, the number of land parcels written down.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse55falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerFollowing an acquisition, the number of land parcels written down.No authoritative reference available.falsefalseThe number of land parcels written down15false0spg_DebtRepaymentsspgfalsedebitdurationThis element represents the repaid debts.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12truefalsefalse310700000310700000falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the repaid debts.No authoritative reference available.falsefalseMortgage indebtedness repaid16false0spg_AcquisitionConsiderationPaidspgfalsedebitdurationThe amount of consideration paid for acquisition, as of the balance sheet date.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse62000006200000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of consideration paid for acquisition, as of the balance sheet date.No authoritative reference available.falsefalseAcquisition, consideration paid17false0spg_CostOfAcquisitonIncludingAssumptionOfDebtspgfalsedebitinstantThe total cost of acquisition of real estate including the assumption of existing indebtedness.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12truefalsefalse23000000002300000000falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe total cost of acquisition of real estate including the assumption of existing indebtedness.No authoritative reference available.falsefalseCost of acquisition including assumption of debt18false0us-gaap_BusinessAcquisitionPurchasePriceAllocationNotesPayableAndLongTermDebtus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12truefalsefalse12000000001200000000falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of acquisition cost of a business combination allocated to notes payables and long-term debt assumed from the acquired entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph g Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 98-1 falsefalseMortgage indebtedness assumed19false0us-gaap_BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12truefalsefalse193600000193600000falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 52 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e falsefalseAcquisiton related intangibles related to in-place leases20false0us-gaap_AcquiredFiniteLivedIntangibleAssetWeightedAverageUsefulLifeus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12truefalsefalse66falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:decimalItemTypedecimalThe calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 44 -Subparagraph a(3) falsefalseWeighted average useful life, in-place leases21false0spg_PercentageOfConsiderationPaidInCashspgfalsenadurationThis element represents the percentage of consideration paid in cash.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalse4falsetruefalse00falsefalsefalsefalsefalse5falsetruefalse00falsefalsefalsefalsefalse6falsetruefalse00falsefalsefalsefalsefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalse10falsetruefalse00falsefalsefalsetruefalse11falsetruefalse00falsefalsefalsetruefalse12truetruefalse0.800.80falsefalsefalsetruefalse13falsetruefalse00falsefalsefalsetruefalse14falsetruefalse00falsefalsefalsetruefalse15falsetruefalse00falsefalsefalsetruefalse16falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThis element represents the percentage of consideration paid in cash.No authoritative reference available.falsefalsePercentage of consideration paid in cash (as a percent)22false0spg_PercentageOfConsiderationPaidInUnitsspgfalsenadurationThis element represents the percentage of consideration paid in units.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalse4falsetruefalse00falsefalsefalsefalsefalse5falsetruefalse00falsefalsefalsefalsefalse6falsetruefalse00falsefalsefalsefalsefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalse10falsetruefalse00falsefalsefalsetruefalse11falsetruefalse00falsefalsefalsetruefalse12truetruefalse0.200.20falsefalsefalsetruefalse13falsetruefalse00falsefalsefalsetruefalse14falsetruefalse00falsefalsefalsetruefalse15falsetruefalse00falsefalsefalsetruefalse16falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThis element represents the percentage of consideration paid in units.No authoritative reference available.falsefalsePercentage of consideration paid in units (as a percent)23false0spg_OperatingPartnershipCapitalAccountUnitsIssuedspgfalsenainstantThis element represents the number of units issued by the Operating Partnership.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12truefalsefalse17000001.7falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesThis element represents the number of units issued by the Operating Partnership.No authoritative reference available.falsefalseOperating partnership capital account units, issued (in units)24false0spg_OperatingPartnershipCapitalAccountAmountspgfalsecreditinstantThis element represents the amount of units issued by the Operating Partnership.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12truefalsefalse154500000154500000falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the amount of units issued by the Operating Partnership.No authoritative reference available.falsefalseOperating partnership capital account, amount25false0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacityus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14truefalsefalse39000000003900000000falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryMaximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 falsefalseCredit facility, maximum borrowing capacity26true0spg_BusinessAcquisitionAssetsAndLiabilitiesAcquiredAbstractspgfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSummary of assets acquired and liabilities assumed27false0spg_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsInvestmentPropertiesspgfalsedebitinstantThe amount of investment properties acquired in a business combination.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse21670000002167000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of investment properties acquired in a business combination.No authoritative reference available.falsefalseInvestment properties28false0us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashAndCashEquivalentsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse2600000026000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of cash and cash equivalents acquired in a business combination.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e falsefalseCash and cash equivalents29false0spg_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsTenantReceivablesAndAccruedRevenueNetspgfalsedebitinstantThe amount of tenant receivables and accrued revenue, net, acquired in a business combination.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse40000004000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of tenant receivables and accrued revenue, net, acquired in a business combination.No authoritative reference available.falsefalseTenant receivables and accrued revenue, net30false0us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse234000000234000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of acquisition cost of a business combination allocated to current assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e falsefalseDeferred costs and other assets (including intangibles)31false0us-gaap_BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse24310000002431000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of acquisition cost of a business combination allocated to assets acquired.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph g truefalseTotal assets32false0spg_BusinessAcquisitionPurchasePriceAllocationLiabilitiesMortgagesAndOtherIndebtednessspgfalsecreditinstantThe amount of acquisition cost of a business combination allocated to the mortgages and other indebtedness of the acquired...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse12700000001270000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of acquisition cost of a business combination allocated to the mortgages and other indebtedness of the acquired entity.No authoritative reference available.falsefalseMortgages and other indebtedness, including premium of $2833false0spg_BusinessAcquisitionPurchasePriceAllocationOtherCurrentLiabilitiesspgfalsecreditinstantThe amount of acquisition cost of a business combination allocated to the accounts payable, accrued expenses, intangibles and...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse2900000029000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of acquisition cost of a business combination allocated to the accounts payable, accrued expenses, intangibles and other current liabilities of the acquired entity.No authoritative reference available.falsefalseAccounts payable, accrued expenses, intangibles and other34false0us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesOtherLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse1800000018000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of acquisition cost of a business combination allocated to other current liabilities of the acquired entity. Does not include amounts allocated to the current portion of long-term debt, accounts payable and accrued expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e falsefalseOther liabilities35false0us-gaap_BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumedus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse13170000001317000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of acquisition cost of a business combination allocated to liabilities assumed.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph g Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 98-1 truefalseTotal liabilities36false0spg_NumberOfPropertiesSoldspgfalsenadurationThe number of properties which were sold.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16truefalsefalse44falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerThe number of properties which were sold.No authoritative reference available.falsefalseNumber of consolidated properties sold37false0spg_ImpairmentExpensespgfalsedebitdurationImpairment related to consolidated investment properties, investments in unconsolidated entities, and available for sale...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse81690008169000falsefalsefalsefalsefalse3truefalsefalse240050000240050000falsefalsefalsefalsefalse4truefalsefalse2117200021172000falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryImpairment related to consolidated investment properties, investments in unconsolidated entities, and available for sale investment securities.No authoritative reference available.falsefalseImpairment charges38false0spg_ImpairmentExpenseNetOfTaxspgfalsedebitdurationAfter tax impairment related to consolidated investment properties, investments in unconsolidated entities, and available for...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse228600000228600000falsefalsefalsefalsefalse4truefalsefalse1940000019400000falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryAfter tax impairment related to consolidated investment properties, investments in unconsolidated entities, and available for sale investment securities.No authoritative reference available.falsefalseNon-cash impairment charges, net of tax39false0spg_ImpairmentExpenseTaxEffectspgfalsedebitdurationTax effect on impairment related to consolidated investment properties, investments in unconsolidated entities, and available...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse58000005800000falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryTax effect on impairment related to consolidated investment properties, investments in unconsolidated entities, and available for sale investment securities.No authoritative reference available.falsefalseNon-cash impairment charges, tax effect40false0spg_ImpairmentExpenseShareOfNoncontrollingInterestHoldersspgfalsedebitdurationRepresents the share of noncontrolling interest holders in impairment related to consolidated investment properties,...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse57000005700000falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents the share of noncontrolling interest holders in impairment related to consolidated investment properties, investments in unconsolidated entities, and available for sale investment securities.No authoritative reference available.falsefalseShare of noncontrolling interest holders in non-cash impairment charges41false0spg_AmountOfReductionInCarryingAmountOfPropertiesspgfalsedebitdurationRepresents the amount of reduction in the carrying value of a property to its estimated net realizable value.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsetruefalse8truefalsefalse1050000010500000falsetruefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents the amount of reduction in the carrying value of a property to its estimated net realizable value.No authoritative reference available.falsefalseReduction in the carrying value to estimated net realizable value1640Real Estate Acquisitions, Disposals, and Impairment (Details) (USD $)NoRoundingHundredThousandsUnKnownUnKnowntruetrue