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The excess cash inflow from the refinancing of debt, where the old debt is replaced by a new debt.

No definition available.

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Represents the number of properties contributed to form joint venture.

No definition available.

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Represents the number of Kaufhof, Germany's leading department store, properties purchased by the joint venture.

No definition available.

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Represents the number of properties being leased back from the joint venture.

No definition available.

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Represents the percentage of property space subject to recapture.

No definition available.

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Represents the ownership interest in the retail property.

No definition available.

Name:	simon_RealEstateOwnershipInterest
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Area of a real estate property.

No definition available.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Percentage of voting equity interests acquired in a business combination achieved in stages, including equity interests in the acquiree held by the acquirer immediately before the acquisition date and acquired at the acquisition date.

No definition available.

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In a business combination achieved in stages, this element represents the amount of net gain (loss) recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

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The aggregate costs related to construction and development services during the reporting period.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The amount of assets reported by an equity method investment of the entity.

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The amount of income (loss) from continuing operations before extraordinary items reported by an equity method investment of the entity.

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The amount of liabilities reported by an equity method investment of the entity.

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The amount of net income (loss) reported by an equity method investment of the entity.

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The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Name:	us-gaap_IncomeLossFromEquityMethodInvestments
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The cash outflow for acquisition of or capital improvements to properties held for investment (operating, managed, leased) or for use.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

No definition available.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

No definition available.

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Line 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.

No definition available.

Name:	us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
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Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=simon_HoustonGalleriaMember
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