2.2.0.25truefalse4070 - Disclosure - Investment in Unconsolidated Entities (Details)truefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 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$2falsefalseUSDfalsefalse1/1/2009 - 12/31/2009 USD ($) 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$3falsefalsetruefalse{spg_JointVenturesByLocationAxis} : United States joint ventures 12/31/2010 I2010_UnitedStatesJointVentureMemberhttp://www.sec.gov/CIK0001063761instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseUnited States joint venturesspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_UnitedStatesJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli04falsefalseUSDtruefalse{spg_JointVenturesByLocationAxis} : Nashville, TN 5/1/2010 - 5/31/2010 USD ($) $D2010Q2_M05_NashvilleTNMemberhttp://www.sec.gov/CIK0001063761duration2010-05-01T00:00:002010-05-31T00:00:00falsefalseNashville, TNspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_NashvilleTNMemberspg_JointVenturesByLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$5falsefalsetruefalse{spg_JointVenturesByLocationAxis} : European joint ventures 12/31/2010 I2010_EuropeanJointVentureMemberhttp://www.sec.gov/CIK0001063761instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseEuropean joint venturesspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_EuropeanJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli06falsefalsetruefalse{spg_JointVenturesByLocationAxis} : European joint ventures 12/31/2009 I2009_EuropeanJointVentureMemberhttp://www.sec.gov/CIK0001063761instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseEuropean joint venturesspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_EuropeanJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli07falsefalseEURtruefalse{spg_JointVenturesByLocationAxis} : Simon Ivanhoe 7/1/2010 - 7/31/2010 EUR (€) €D2010Q3_M0715_SimonIvanhoeJointVentureMemberhttp://www.sec.gov/CIK0001063761duration2010-07-01T00:00:002010-07-31T00:00:00falsefalseSimon Ivanhoespg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_SimonIvanhoeJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberEURStandardhttp://www.xbrl.org/2003/iso4217EURiso42170EUREUR€8falsefalseUSDtruefalse{spg_JointVenturesByLocationAxis} : Simon Ivanhoe 7/1/2010 - 7/31/2010 USD ($) $D2010Q3_M0715_SimonIvanhoeJointVentureMemberhttp://www.sec.gov/CIK0001063761duration2010-07-01T00:00:002010-07-31T00:00:00falsefalseSimon Ivanhoespg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_SimonIvanhoeJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9falsefalseUSDtruefalse{spg_JointVenturesByLocationAxis} : GCI 12/31/2010 USD ($) $I2010_GallerieCommercialiItaliaMemberhttp://www.sec.gov/CIK0001063761instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseGCIspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_GallerieCommercialiItaliaMemberspg_JointVenturesByLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$10falsefalseUSDtruefalse{spg_JointVenturesByLocationAxis} : GCI 12/31/2009 USD ($) $I2009_GallerieCommercialiItaliaMemberhttp://www.sec.gov/CIK0001063761instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseGCIspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_GallerieCommercialiItaliaMemberspg_JointVenturesByLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$11falsefalseUSDtruefalse{spg_JointVenturesByLocationAxis} : Japan joint ventures 12/31/2010 USD ($) $I2010_JapanJointVentureMemberhttp://www.sec.gov/CIK0001063761instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseJapan joint venturesspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_JapanJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$12falsefalseUSDtruefalse{spg_JointVenturesByLocationAxis} : Japan joint ventures 12/31/2009 USD ($) $I2009_JapanJointVentureMemberhttp://www.sec.gov/CIK0001063761instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseJapan joint venturesspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_JapanJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$13falsefalseUSDtruefalse{spg_JointVenturesByLocationAxis} : China joint ventures 12/1/2009 - 12/31/2009 USD ($) $D2009Q4_M12_ChinaJointVentureMemberhttp://www.sec.gov/CIK0001063761duration2009-12-01T00:00:002009-12-31T00:00:00falsefalseChina joint venturesspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_ChinaJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$14falsefalsetruefalse{spg_JointVenturesByLocationAxis} : Mexico joint venture 12/31/2010 I2010_MexicoJointVentureMemberhttp://www.sec.gov/CIK0001063761instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseMexico joint venturespg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_MexicoJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli015falsefalseUSDtruefalse{spg_JointVenturesByLocationAxis} : South Korea joint ventures 12/31/2010 USD ($) / shares USD ($) $I2010_SouthKoreaJointVentureMemberhttp://www.sec.gov/CIK0001063761instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseSouth Korea joint venturesspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_SouthKoreaJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberUSDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$16falsefalseUSDtruefalse{spg_JointVenturesByLocationAxis} : South Korea joint ventures 12/31/2009 USD ($) $I2009_SouthKoreaJointVentureMemberhttp://www.sec.gov/CIK0001063761instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseSouth Korea joint venturesspg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_SouthKoreaJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$17falsefalsetruefalse{spg_JointVenturesByLocationAxis} : Malaysia joint venture 12/31/2010 I2010_MalaysiaJointVentureMemberhttp://www.sec.gov/CIK0001063761instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseMalaysia joint venturespg_JointVenturesByLocationAxisxbrldihttp://xbrl.org/2006/xbrldispg_MalaysiaJointVentureMemberspg_JointVenturesByLocationAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli05true0spg_RealEstateJointVenturesItemListAbstractspgfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseReal Estate Joint Ventures6false0spg_IncomeProducingPropertiesNumberspgfalsenainstantThe number of income producing properties owned or in which an ownership interest is held.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse101101falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse4545falsefalsefalsetruefalse6truefalsefalse5151falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11truefalsefalse88falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14truefalsefalse11falsefalsefalsetruefalse15truefalsefalse11falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerThe number of income producing properties owned or in which an ownership interest is held.No authoritative reference available.falsefalseNumber of income-producing properties7false0spg_JointVenturesNumberspgfalsenainstantThe number of joint ventures in which the entity has an ownership interest.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse11falsefalsefalsetruefalse6truefalsefalse22falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerThe number of joint ventures in which the entity has an ownership interest.No authoritative reference available.falsefalseNumber of joint ventures8false0spg_PropertiesUnderDevelopmentNumberspgfalsenainstantThe number of properties under development or held for future development, owned or in which an ownership interest is held.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15truefalsefalse22falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17truefalsefalse11falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerThe number of properties under development or held for future development, owned or in which an ownership interest is held.No authoritative reference available.falsefalseNumber of properties under development9true0spg_InternationalJointVentureInvestmentsItemListAbstractspgfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseInternational Joint Venture Investments10false0us-gaap_EquityMethodInvestmentsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse13901050001390105000falsetruefalsefalsefalse2truefalsefalse14685770001468577000falsetruefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9truefalsefalse330100000330100000falsetruefalsetruefalse10truefalsefalse302200000302200000falsetruefalsetruefalse11truefalsefalse340800000340800000falsetruefalsetruefalse12truefalsefalse302200000302200000falsetruefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15truefalsefalse3570000035700000falsetruefalsetruefalse16truefalsefalse2610000026100000falsetruefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment losses recognized.No authoritative reference available.falsefalseInvestment in unconsolidated entities, at equity11false0us-gaap_EquityMethodInvestmentOwnershipPercentageus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsetruefalse4truetruefalse0.500.50falsefalsefalsetruefalse5falsetruefalse00falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalse10truetruefalse0.490.49falsefalsefalsetruefalse11falsetruefalse00falsefalsefalsetruefalse12truetruefalse0.400.40falsefalsefalsetruefalse13truetruefalse0.3250.325falsefalsefalsetruefalse14falsetruefalse00falsefalsefalsetruefalse15falsetruefalse00falsefalsefalsetruefalse16truetruefalse0.500.50falsefalsefalsetruefalse17falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThe percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) falsefalsePercentage ownership interest (as a percent)12false0spg_ExcessInsuranceCarrierMinimumCoverageProvidedspgfalsedebitdurationThe minimum claim amount required to be submitted before the excess insurance carrier's coverage liability takes effect.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4truefalsefalse5000000050000000falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe minimum claim amount required to be submitted before the excess insurance carrier's coverage liability takes effect.No authoritative reference available.falsefalseExcess insurance carrier, minimum coverage13false0us-gaap_ProceedsFromInsuranceSettlementOperatingActivitiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4truefalsefalse5000000050000000falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow from the amounts received by the insured under the terms of an insurance contract settlement. This element pertains only to insurance proceeds related to operating activities. It excludes insurance settlements classified as investing cash flows, for example, insurance settlements related to fixed assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 22 -Subparagraph c falsefalseInsurance proceeds funded by insurers14false0spg_AdditionalProceedsRequestedFromInsuranceCarrierspgfalsedebitdurationInsurance proceeds requested from an excess insurance carrier.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4truefalsefalse150000000150000000falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryInsurance proceeds requested from an excess insurance carrier.No authoritative reference available.falsefalseAdditional insurance proceeds requested16false0spg_ProceedsToJointVenturePartnersFromSaleOfPropertiesspgfalsedebitdurationThis element represents proceeds to joint venture partners from sale of properties.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7truefalsefalse422500000422500000falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents proceeds to joint venture partners from sale of properties.No authoritative reference available.falsefalseConsideration received by joint venture partners from sale of Simon Ivanhoe (in euros)17false0us-gaap_LineOfCreditFacilityDecreaseRepaymentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7truefalsefalse167400000167400000falsefalsefalsetruefalse8truefalsefalse215000000215000000falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryDecrease for amounts repaid on the credit facility for the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 falsefalseCredit facility, amount repaid18false0us-gaap_ProceedsFromDivestitureOfInterestInJointVentureus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13truefalsefalse2900000029000000falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow from the sale of an interest in an investment in an entity in which the reporting entity shares control of the entity with another party or group.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 16 falsefalseProceeds from sale of interest in joint venture19false0spg_AcquisitionOfControllingInterestSaleOrDisposalOfAssetsAndInterestsInUnconsolidatedEntitiesGainOrLossspgfalsecreditdurationIn a business combination achieved in stages, this element represents the amount of gain or loss recognized by the entity as...falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-321036000-321036000falsetruefalsefalsefalse2truefalsefalse3010800030108000falsetruefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8truefalsefalse-281000000-281000000falsetruefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13truefalsefalse2000000020000000falsetruefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryIn a business combination achieved in stages, this element represents 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, net1714Investment in Unconsolidated Entities (Details)NoRoundingUnKnownUnKnownUnKnowntruetrue