Equity interest in joint venture's underlying assets.

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Funds net earnings (loss) on interest rate forward swap contracts.

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Fees earned for services provided to unconsolidated property funds.

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Fund partner equity commitment to property fund.

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Gain on acquisition of interest in Joint Venture.

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Impairment charges related to un-operated properties.

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Number of equity method investments impaired.

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Number of properties contributed.

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Number of properties disposed.

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Number of property funds involved in property disposal.

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Number of unconsolidated property funds.

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Ownership percentage in property fund.

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Parent company equity commitment to property fund.

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Percentage of equity interest holds in unconsolidated joint venture.

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Periods for investments acquired activity.

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Proceeds from sale of property funds.

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Unconsolidated Investees.

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Aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due after one year (or one business cycle).

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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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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments accounted for under the equity method of accounting as of the balance sheet date.

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The gains (losses) included in results of operations resulting from the sale or disposal of property, plant and equipment, which do not qualify for treatment as discontinued operations. This item does not include any gain (loss) recognized on the sale of oil and gas property or timber property.

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Amount of the excess of the fair value of acquired net assets over the cost of an acquired business after pro rata reduction of the amounts that otherwise would have been assigned to acquired assets except financial assets other than investments accounted for by the equity method, assets to be disposed of by sale, deferred tax assets, prepaid assets relating to pension and postretirement benefit plans, and other current assets. This amount is considered an extraordinary item and often referred to as negative goodwill. This element is gross of the related tax effect.

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The carrying amount, as of the date of the latest financial statement presented, of real estate owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

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Unconsolidated Investees (Details Textuals) In Millions, unless otherwise specified	1 Months Ended		3 Months Ended			9 Months Ended			1 Months Ended			3 Months Ended
	Oct. 31, 2011 USD ($) Property ac Country sqft Notes InterestRateSwapContract	Apr. 30, 2011 USD ($)	Sep. 30, 2011 USD ($) Property ac Country sqft Notes InterestRateSwapContract	Jun. 30, 2011 USD ($) Investment	Sep. 30, 2010 USD ($)	Sep. 30, 2011 USD ($) PartnershipUnit Segments Entity Property sqft ac Country Notes InterestRateSwapContract	Sep. 30, 2010 USD ($)	Sep. 30, 2011 Prologis Brazil Logistics Partners Fund I [Member]	Oct. 31, 2011 Prologis Targeted European Logistics Fund [Member] USD ($) Property	Oct. 31, 2011 Prologis Targeted European Logistics Fund [Member] EUR (€)	Jun. 30, 2011 U.S., Prologis North American Industrial Fund III Level 3 [Member] USD ($)	Jun. 30, 2011 Level 3 [Member] Investment
Schedule of Equity Method Investments [Line Items]
Ownership percentage in property fund			28.50%			28.50%		50.00%
Prologis equity commitment to ProLogis Mexico Fondo Logistico			$ 59.0			$ 59.0			$ 110.3	€ 82.0
Number of properties contributed	40					4			2	2
Total proceeds on properties	320.0		7.9			7.9			43.0	31.1
Number of investments in property funds				2								1
Fair value of investment in property funds											31.5
Unconsolidated Investees (Textuals) [Abstract]
Investments in unconsolidated property funds			15			15
Fees earned from other investees and third parties			1.9		1.1	8.9	3.3
Percentage of indirect ownership			28.50%			28.50%		50.00%
Fund partner equity commitment to ProLogis Mexico Fondo Logistico			235.8			235.8
Ownership percentage in property fund			less than 100%			less than 100%
Notes receivable from property funds			21.4		21.4	21.4	21.4
Net loss on interest rate forward swap contracts			6.3			24.9
Impairment charges related to unoperated properties							12.4
Direct owned property value pledged as additional collateral			276.0			276.0
Gain on disposition of property						33.6
Number of property funds involved in property disposal						1
Number of properties disposed						13
Gain on acquisition of property in Europe						6.4
Impairment charges on investments				103.8
Percentage of equity interest holds in unconsolidated joint venture						50.00%
Equity interest in joint venture's underlying assets						25.00%
Ownership interest to fair value		$ 13.5
Periods for investments acquired activity			3 months			4 months