2.2.0.25falsefalse4060 - Disclosure - Investment Properties (Details)truefalseIn Thousandsfalse1falsefalseUSDfalsefalse12/31/2010 USD ($) USD ($) / shares $I2010http://www.sec.gov/CIK0001063761instant2010-12-31T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falsefalseUSDfalsefalse12/31/2009 USD ($) USD ($) / shares $I2009http://www.sec.gov/CIK0001063761instant2009-12-31T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0spg_InvestmentPropertiesDisclosureAbstractspgfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseInvestment Properties3false0us-gaap_Landus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse29290540002929054falsetruefalsefalsefalse2truefalsefalse27579940002757994falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCarrying amount as of the balance sheet date of real estate held for productive use. This excludes land held for sale.No authoritative reference available.falsefalseLand4false0us-gaap_InvestmentBuildingAndBuildingImprovementsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse2426316900024263169falsefalsefalsefalsefalse2truefalsefalse2226572100022265721falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements.No authoritative reference available.falsefalseBuildings and improvements5false0spg_InvestmentLandBuildingAndBuildingImprovementsspgfalsedebitinstantAggregate of the carrying amounts as of the balance sheet date of investments in land, building and building improvements.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse2719222300027192223falsefalsefalsefalsefalse2truefalsefalse2502371500025023715falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAggregate of the carrying amounts as of the balance sheet date of investments in land, building and building improvements.No authoritative reference available.falsefalseTotal land, buildings and improvements6false0us-gaap_FixturesAndEquipmentGrossus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse316512000316512falsefalsefalsefalsefalse2truefalsefalse312474000312474falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents fixtures and equipment of investment properties of the reporting entity as of the date of the statement of financial position. Fixtures may include and consist of: machinery, equipment, engines, boilers, incinerators, installed building materials; systems and equipment for the purpose of supplying or distributing heating, cooling, electricity, gas, water, air, or light; antennas, cable, wiring and conduits used in connection with radio, television, security, fire prevention, or fire detection or otherwise used to carry electronic signals; telephone systems and equipment; elevators and related machinery and equipment; fire detection, prevention and extinguishing systems and apparatus; security and access control systems and apparatus; plumbing systems; water heaters, ranges, stoves, microwave ovens, refrigerators, dishwashers, garbage disposers, washers, dryers and other appliances; light fixtures, awnings, storm windows and storm doors; pictures, screens, blinds, shades, curtains and curtain rods; mirrors; cabinets, paneling, rugs and floor and wall coverings; fences, trees and plants; swimming pools; and such other items as defined by the reporting entity.No authoritative reference available.falsefalseFurniture, fixtures and equipment7false0us-gaap_RealEstateInvestmentPropertyAtCostus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse2750873500027508735falsefalsefalsefalsefalse2truefalsefalse2533618900025336189falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents a total which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.No authoritative reference available.falsefalseInvestment properties, at cost8false0us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciationus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse77113040007711304falsefalsefalsefalsefalse2truefalsefalse70045340007004534falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cumulative amount of depreciation for real estate property held for investment purposes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 7 falsefalseLess - accumulated depreciation9false0us-gaap_RealEstateInvestmentPropertyNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse1979743100019797431falsefalsefalsefalsefalse2truefalsefalse1833165500018331655falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net book value of real estate property held for investment purposes.No authoritative reference available.truefalseInvestment properties, net10false0us-gaap_DevelopmentInProcessus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse125227000125227falsetruefalsefalsefalse2truefalsefalse281683000281683falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe current amount of expenditures for a real estate project that has not yet been completed.No authoritative reference available.falsefalseConstruction in progress, included above29Investment Properties (Details) (USD $)ThousandsUnKnownUnKnownUnKnownfalsetrue