2.2.0.25truefalse4101 - Disclosure - Equity (Details 2)truefalsefalse1falsefalseUSDfalsefalse4/1/2010 - 4/30/2010 USD ($) $D2010Q2_M04http://www.sec.gov/CIK0001063761duration2010-04-01T00:00:002010-04-30T00:00:00SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falsefalseUSDfalsefalse12/31/2010 USD ($) 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$3falsefalseUSDfalsefalse12/31/2009 USD ($) 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$4falsefalsetruefalse{us-gaap_StatementClassOfStockAxis} : 6% Series I Convertible Perpetual Preferred Stock 1/1/2010 - 12/31/2010 D2010_SeriesI6PercentConvertiblePerpetualPreferredStockMember_Ehttp://www.sec.gov/CIK0001063761duration2010-01-01T00:00:002010-12-31T00:00:00falsefalse6% Series I Convertible Perpetual Preferred Stockus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldispg_SeriesI6PercentConvertiblePerpetualPreferredStockMemberus-gaap_StatementClassOfStockAxisexplicitMemberSharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli05falsefalsetruefalse{us-gaap_StatementClassOfStockAxis} : 6% Series I Convertible Perpetual Preferred Stock 1/1/2009 - 12/31/2009 D2009_SeriesI6PercentConvertiblePerpetualPreferredStockMember_Ehttp://www.sec.gov/CIK0001063761duration2009-01-01T00:00:002009-12-31T00:00:00falsefalse6% Series I Convertible Perpetual Preferred Stockus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldispg_SeriesI6PercentConvertiblePerpetualPreferredStockMemberus-gaap_StatementClassOfStockAxisexplicitMemberSharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli06falsefalsetruefalse{us-gaap_StatementClassOfStockAxis} : 6% Series I Convertible Perpetual Preferred Stock 1/1/2004 - 12/31/2004 D2004_SeriesI6PercentConvertiblePerpetualPreferredStockMember_Ehttp://www.sec.gov/CIK0001063761duration2004-01-01T00:00:002004-12-31T00:00:00falsefalse6% Series I Convertible Perpetual Preferred Stockus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldispg_SeriesI6PercentConvertiblePerpetualPreferredStockMemberus-gaap_StatementClassOfStockAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli07falsefalseUSDtruefalse{us-gaap_StatementClassOfStockAxis} : 6% Series I Convertible Perpetual Preferred Units 1/1/2010 - 12/31/2010 D2010_SeriesI6PercentConvertiblePerpetualPreferredUnitsMember_Ehttp://www.sec.gov/CIK0001063761duration2010-01-01T00:00:002010-12-31T00:00:00falsefalse6% Series I Convertible Perpetual Preferred Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldispg_SeriesI6PercentConvertiblePerpetualPreferredUnitsMemberus-gaap_StatementClassOfStockAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$8falsefalseUSDtruefalse{us-gaap_StatementClassOfStockAxis} : 6% Series I Convertible Perpetual Preferred Units 1/1/2009 - 12/31/2009 D2009_SeriesI6PercentConvertiblePerpetualPreferredUnitsMember_Ehttp://www.sec.gov/CIK0001063761duration2009-01-01T00:00:002009-12-31T00:00:00falsefalse6% Series I Convertible Perpetual Preferred Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldispg_SeriesI6PercentConvertiblePerpetualPreferredUnitsMemberus-gaap_StatementClassOfStockAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0$9falsefalsetruefalse{us-gaap_StatementClassOfStockAxis} : 6% Series I Convertible Perpetual Preferred Units 1/1/2004 - 12/31/2004 D2004_SeriesI6PercentConvertiblePerpetualPreferredUnitsMember_Ehttp://www.sec.gov/CIK0001063761duration2004-01-01T00:00:002004-12-31T00:00:00falsefalse6% Series I Convertible Perpetual Preferred Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldispg_SeriesI6PercentConvertiblePerpetualPreferredUnitsMemberus-gaap_StatementClassOfStockAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli010falsefalseUSDtruefalse{us-gaap_StatementClassOfStockAxis} : 7.5% Cumulative Redeemable Preferred Units 1/1/2010 - 12/31/2010 D2010_CumulativeRedeemablePreferredUnits7.50PercentMember_Ehttp://www.sec.gov/CIK0001063761duration2010-01-01T00:00:002010-12-31T00:00:00falsefalse7.5% Cumulative Redeemable Preferred Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldispg_CumulativeRedeemablePreferredUnits7.50PercentMemberus-gaap_StatementClassOfStockAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0$11falsefalseUSDtruefalse{us-gaap_StatementClassOfStockAxis} : 7.5% Cumulative Redeemable Preferred Units 1/1/2009 - 12/31/2009 D2009_CumulativeRedeemablePreferredUnits7.50PercentMember_Ehttp://www.sec.gov/CIK0001063761duration2009-01-01T00:00:002009-12-31T00:00:00falsefalse7.5% Cumulative Redeemable Preferred Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldispg_CumulativeRedeemablePreferredUnits7.50PercentMemberus-gaap_StatementClassOfStockAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$2true0us-gaap_RedeemablePreferredStockLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseRedeemable preferred stock3false0spg_TemporaryEquityDividendRatePercentagespgfalsenadurationThe percentage of dividend rate on temporary equity.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalse4falsetruefalse00falsefalsefalsetruefalse5falsetruefalse00falsefalsefalsetruefalse6truetruefalse0.060.06falsefalsefalsetruefalse7truetruefalse0.060.06falsefalsefalsetruefalse8truetruefalse0.060.06falsefalsefalsetruefalse9truetruefalse0.060.06falsefalsefalsetruefalse10truetruefalse0.0750.075falsefalsefalsetruefalse11truetruefalse0.0750.075falsefalsefalsetruefalseOtherus-types:percentItemTypepureThe percentage of dividend rate on temporary equity.No authoritative reference available.falsefalseTemporary equity stated dividend rate percentage (as a percent)4false0spg_TemporaryEquityRedemptionPriceEvaluationPeriodspgfalsenadurationThe number of trading days for which the closing price of the stock is evaluated in order to determine whether redemption of...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4truefalsefalse2020falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerThe number of trading days for which the closing price of the stock is evaluated in order to determine whether redemption of the temporary equity may occur.No authoritative reference available.falsefalseTemporary equity redemption basis, closing price evaluation period (in days)5false0spg_TemporaryEquityRedemptionPriceTradingPeriodspgfalsenadurationThe number of trading days in which the evaluation period of the closing price of the stock is calculated in order to...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4truefalsefalse3030falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerThe number of trading days in which the evaluation period of the closing price of the stock is calculated in order to determine whether redemption of the temporary equity may occur.No authoritative reference available.falsefalseTemporary equity redemption basis, closing price trading period (in days)6false0spg_ConvertiblePreferredSharesConversionRatiospgfalsenadurationThe conversion ratio used for converting each share of preferred stock or preferred units into common stock or units of the...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse0.8474950.847495falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse0.8474950.847495falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesThe conversion ratio used for converting each share of preferred stock or preferred units into common stock or units of the Operating Partnership.No authoritative reference available.falsefalseConversion ratio, number of common stock shares into which Series I and J preferred stock is convertible (in shares)7false0spg_LimitedPartnersPreferredInterestInOperatingPartnershipspgfalsecreditinstantRepresents the limited partners' preferred interest in an operating partnership.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse2553700025537000falsetruefalsefalsefalse3truefalsefalse7641100076411000falsetruefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7truefalsefalse00falsetruefalsetruefalse8truefalsefalse5087400050874000falsetruefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10truefalsefalse2553700025537000falsetruefalsetruefalse11truefalsefalse2553700025537000falsetruefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents the limited partners' preferred interest in an operating partnership.No authoritative reference available.falsefalseLimited partners' preferred interest in the Operating Partnership8false0spg_NoncontrollingRedeemableInterestsInPropertiesspgfalsecreditinstantRepresents the limited partners' interests in other noncontrolling redeemable properties.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse5993200059932000falsefalsefalsefalsefalse3truefalsefalse4940400049404000falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents the limited partners' interests in other noncontrolling redeemable properties.No authoritative reference available.falsefalseOther noncontrolling redeemable interests in properties9false0spg_LimitedPartnersPreferredInterestInOperatingPartnershipAndNoncontrollingRedeemableInterestsInPropertiesspgfalsecreditinstantRepresents the Limited Partners' Preferred Interest in Operating Partnership and Noncontrolling Redeemable Interests in...falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse8546900085469000falsefalsefalsefalsefalse3truefalsefalse125815000125815000falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents the Limited Partners' Preferred Interest in Operating Partnership and Noncontrolling Redeemable Interests in Properties.No authoritative reference available.truefalseLimited partners' preferred interest in the Operating Partnership and other noncontrolling redeemable interests in properties10false0us-gaap_TemporaryEquitySharesAuthorizedus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse1900000019000000falsefalsefalsefalsefalse3truefalsefalse1900000019000000falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7truefalsefalse1900000019000000falsefalsefalsetruefalse8truefalsefalse1900000019000000falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10truefalsefalse260000260000falsefalsefalsetruefalse11truefalsefalse260000260000falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesThe maximum number of securities classified as temporary equity that are permitted to be issued by an entity's charter and bylaws. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 3, 4, 5, 6, 7, 8 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 28 -Subparagraph b -Article 5 falsefalseTemporary equity, shares authorized (in shares)11false0us-gaap_TemporaryEquitySharesIssuedus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse80911558091155falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7truefalsefalse00falsefalsefalsetruefalse8truefalsefalse10174801017480falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10truefalsefalse255373255373falsefalsefalsetruefalse11truefalsefalse255373255373falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesThe number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 28 -Subparagraph b -Article 5 falsefalseTemporary equity, shares issued (in shares)12false0us-gaap_TemporaryEquitySharesOutstandingus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse80911558091155falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7truefalsefalse00falsefalsefalsetruefalse8truefalsefalse10174801017480falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10truefalsefalse255373255373falsefalsefalsetruefalse11truefalsefalse255373255373falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesThe number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 28 -Subparagraph b -Article 5 falsefalseTemporary equity, shares outstanding (in shares)13false0spg_UnitsIssuedDuringPeriodUnitsConversionOfPreferredUnitsspgfalsenadurationNumber of partnership units issued during the period as a result of the conversion of preferred units.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse10174801017480falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesNumber of partnership units issued during the period as a result of the conversion of preferred units.No authoritative reference available.falsefalseUnits issued by Operating Partnership due to conversion of Series I Preferred Units (in units)14false0spg_PreferredUnitsConvertedDuringPeriodUnitsspgfalsenadurationNumber of preferred units converted to common units during the period.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse862292862292falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesNumber of preferred units converted to common units during the period.No authoritative reference available.falsefalseSeries I Preferred Units converted to common units (in units)15false0spg_PreferredStockRedeemedByCashPaymentSharesspgfalsenadurationThe number of shares of preferred stock redeemed through a cash redemption payment.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse219879219879falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesThe number of shares of preferred stock redeemed through a cash redemption payment.No authoritative reference available.falsefalseSeries I Preferred Stock redeemed by cash redemption payment (in shares)16false0spg_PreferredStockRedeemedByCashPaymentAmountOfPaymentspgfalsenadurationThe amount of cash redemption payments made to redeem preferred stock.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1110000011100000falsetruefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of cash redemption payments made to redeem preferred stock.No authoritative reference available.falsefalseCash redemption payment made to redeem remaining Series I Preferred Stock17false0spg_DistributionMadeToMemberOrLimitedPartnerPerUnitspgfalsenainstantThe cumulative amount of quarterly distributions per share or per unit.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10truefalsefalse7.57.5falsetruefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseEPSus-types:perShareItemTypedecimalThe cumulative amount of quarterly distributions per share or per unit.No authoritative reference available.falsetrueCumulative quarterly distributions on preferred units (in dollars per share)18false0spg_ConversionBasisOfPreferredUnitsIntoPreferredStockspgfalsenadurationDescribes the conversion features of preferred units if such units is convertible, that is, conversion of preferred units...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00one-for-oneone-for-onefalsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringDescribes the conversion features of preferred units if such units is convertible, that is, conversion of preferred units into preferred stock.No authoritative reference available.falsefalseConversion basis of preferred units into preferred stock19false0spg_TemporaryEquityRedemptionPricePerSharespgfalsenainstantAmount to be paid per share that is classified as temporary equity by entity upon redemption. Temporary equity is a security...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10truefalsefalse100100falsetruefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseEPSus-types:perShareItemTypedecimalAmount to be paid per share that is classified as temporary equity by entity upon redemption. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.No authoritative reference available.falsetrueTemporary equity redemption price (in dollars per share)20false0us-gaap_PreferredStockLiquidationPreferenceus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10truefalsefalse100100falsetruefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseEPSus-types:perShareItemTypedecimalThe per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph d -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4, 6 falsetrueLiquidation preference (in dollars per share)1119Equity (Details 2) (USD $)NoRoundingNoRoundingNoRoundingUnKnowntruetrue