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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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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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This item represents the disclosure of summarized financial information for unconsolidated subsidiaries and 50 percent-or-less owned entities accounted for using the equity method of accounting. If investments in common stock of corporate joint ventures or other investments accounted for under the equity method are, in the aggregate, material in relation to the financial position or results of operations of an investor, it may be necessary to present summarized information as to assets of the investee, or group of investments for which combined disclosure is appropriate, either by individual financial statement caption or in groups, as appropriate. Such summarized financial information may, at a minimum, include current and noncurrent assets, the total of which components are represented herein.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable form a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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Unconsolidated Investees (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
Unconsolidated Investees (Details) (USD $)	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Apr. 30, 2011
Summary of investments
Investments in and advances to unconsolidated investees	$ 3,012,144,000		$ 3,012,144,000		$ 2,024,661,000
Summarized financial information of the property fund entities
Revenues	379,600	371,600	746,300	763,000
Net earnings (loss)	5,400	(25,500)	12,500	(32,200)
Total assets	21,007,400		21,007,400		16,386,200
Amounts due to (from) us	109,400		109,400		111,600
Third party debt	9,259,800		9,259,800		7,722,200
Total liabilities	10,234,700		10,234,700		8,720,300
Fund partners equity	10,772,700		10,772,700		7,665,900
Our weighted average ownership percentage	2850.00%		2850.00%		2980.00%
Our investment balance	2,606,700		2,606,700		1,890,000
Deferred gains, net of amortization	419,500		419,500		532,200
Summarized financial information (Textuals) [Abstract]
Notes receivable from property funds	21,400,000		21,400,000		21,400,000
Direct owned property value pledged as additional collateral	274,400,000		274,400,000
Net loss on interest rate forward swap contracts					11,900,000
Impairment Charges Related To Unoperated Properties					12,400,000
Investments In The Property Funds Investment Textuals [Abstract]
Impairment Charges Related To Property Funds	103,800,000		103,800,000
Summary Of Remaining Equity Commitments Textuals [Abstract]
Parent Company Equity Commitment to Property Fund	60,000,000		60,000,000
Fund Partner Equity Commitment To Property Fund	240,100,000		240,100,000
Investments In And Advances To Acquired Investments Textuals [Abstract]
Gain From Valuation Of Ownership Interest In Subsidiary						13,500,000
Prologis U.S. Logistics Fund \| Prologis
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	0		0
Prologis U.S. Logistics Fund \| Fund partner
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	177,000,000		177,000,000
Prologis SGP Mexico Fund \| Prologis
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	24,600,000		24,600,000
Prologis SGP Mexico Fund \| Fund partner
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	98,100,000		98,100,000
Prologis Brazil Logistics Partners Fund I \| Prologis
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	96,200,000		96,200,000
Prologis Brazil Logistics Partners Fund I \| Fund partner
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	288,600,000		288,600,000
Prologis Europe Logistics Fund \| Prologis
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	101,500,000		101,500,000
Prologis Europe Logistics Fund \| Fund partner
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	580,100,000		580,100,000
Prologis China Logistics Venture I \| Prologis
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	73,800,000		73,800,000
Prologis China Logistics Venture I \| Fund partner
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	418,200,000		418,200,000
Property Funds
Summary of investments
Investments in and advances to unconsolidated investees	2,606,689,000	1,890,016,000	2,606,689,000	1,890,016,000
Other Investees
Summary of investments
Investments in and advances to unconsolidated investees	405,455,000	134,645,000	405,455,000	134,645,000
Europe
Investments in the property funds, earnings
Earnings from unconsolidated investees, net	5,680,000	5,134,000	14,772,000	13,663,000
Investments in property funds, investment in and advances to
Ownership percentage in property fund	3130.00%		3130.00%		3130.00%
Summarized financial information of the property fund entities
Revenues	169,400	169,500	359,800	356,200
Net earnings (loss)	17,300	6,700	37,800	23,200
Total assets	6,274,400		6,274,400		8,176,700
Amounts due to (from) us	(18,900)		(18,900)		(5,900)
Third party debt	2,257,200		2,257,200		3,476,800
Total liabilities	2,665,900		2,665,900		4,137,600
Fund partners equity	3,608,500		3,608,500		4,039,100
Our weighted average ownership percentage	3130.00%		3130.00%		3130.00%
Our investment balance	720,900		720,900		936,900
Deferred gains, net of amortization	187,700		187,700		297,100
Investments In The Property Funds Investment Textuals [Abstract]
Equity Method Investment Ownership Percentage	3130.00%		3130.00%		3130.00%
Summary Of Remaining Equity Commitments Textuals [Abstract]
Estimated total investment to complete existing development	50,846,000	49,857,000	50,846,000	49,857,000
Asia
Investments in the property funds, earnings
Earnings from unconsolidated investees, net	960,000	207,000	1,169,000	386,000
Investments in property funds, investment in and advances to
Ownership percentage in property fund	1960.00%		1960.00%		2000.00%
Summarized financial information of the property fund entities
Revenues	15,100	2,800	18,100	5,700
Net earnings (loss)	3,500	1,000	4,600	1,900
Total assets	3,187,500		3,187,500		127,300
Amounts due to (from) us	18,400		18,400		200
Third party debt	979,500		979,500		49,200
Total liabilities	1,107,000		1,107,000		52,900
Fund partners equity	2,080,500		2,080,500		74,400
Our weighted average ownership percentage	1960.00%		1960.00%		2000.00%
Our investment balance	297,400		297,400		16,700
Deferred gains, net of amortization	0		0		0
Investments In The Property Funds Investment Textuals [Abstract]
Equity Method Investment Ownership Percentage	1960.00%		1960.00%		2000.00%
Summary Of Remaining Equity Commitments Textuals [Abstract]
Estimated total investment to complete existing development	29,906,000	67,280,000	29,906,000	67,280,000
Americas
Investments in the property funds, earnings
Earnings from unconsolidated investees, net	2,004,000	(5,385,000)	4,626,000	(8,199,000)
Investments in property funds, investment in and advances to
Ownership percentage in property fund	2920.00%		2920.00%		2850.00%
Summarized financial information of the property fund entities
Revenues	195,100	199,300	368,400	401,100
Net earnings (loss)	(15,400)	(33,200)	(29,900)	(57,300)
Total assets	11,545,500		11,545,500		8,082,200
Amounts due to (from) us	109,900		109,900		117,300
Third party debt	6,023,100		6,023,100		4,196,200
Total liabilities	6,461,800		6,461,800		4,529,800
Fund partners equity	5,083,700		5,083,700		3,552,400
Our weighted average ownership percentage	2920.00%		2920.00%		2850.00%
Our investment balance	1,588,400		1,588,400		936,400
Deferred gains, net of amortization	231,800		231,800		235,100
Investments In The Property Funds Investment Textuals [Abstract]
Equity Method Investment Ownership Percentage	2920.00%		2920.00%		2850.00%
Summary Of Remaining Equity Commitments Textuals [Abstract]
Estimated total investment to complete existing development	324,703,000	17,508,000	324,703,000	17,508,000
Prologis
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	296,100,000		296,100,000
Fund partner
Summary Of Remaining Equity Commitments Details [Abstract]
Remaining equity commitments	$ 1,562,000,000		$ 1,562,000,000