Real Estate (Details Textual) (USD $)	3 Months Ended		12 Months Ended
	Jun. 30, 2011	Sep. 30, 2010 Building	Dec. 31, 2011 Customer sqft Property acre	Dec. 31, 2010 sqft Property acre	Dec. 31, 2009	Jun. 02, 2011
Business Acquisition [Line Items]
Number of real estate properties			1,797	985
Acreage of land held for development			10,723	8,990
Number of properties under development				14
Square footage of under developed property				4,900,000
Square footage of industrial property			291,100,000	168,500,000
Number of Development Properties Contributed		5
Impairment Charges	$ 97,000,000		$ 21,237,000	$ 736,612,000	$ 331,592,000
Real Estate (Textual) [Abstract]
Total expected investment upon completion of the properties under development			1,200,000
Gains on acquisitions and dispositions of investments in real estate, net			111,684,000	28,488,000	35,262,000
Gain from the acquisition of controlling interest in joint venture in Japan			13,500,000
Business acquisition purchase price			86,500,000			5,856,500,000
Number of largest customers			25
Annualized collected base rent from largest customers			2.40%
Annualized collected base rent from 25 largest customers			17.90%
Minimum lease payments on leases periods			greater than one year
Pro rata share of specified operating expenses			283,100,000	161,000,000	150,300,000
Japan disaster expense			5,200,000
Cash proceeds from contribution activity			590,800,000
Expected future amortization of leasing commissions			220,600,000
Market leases and rent leveling assets			269,600,000
Prologis European Properties Fund II [Member]
Business Acquisition [Line Items]
Square footage of development property Contributed			2,300,000
Number of properties under development			9
Prologis Targeted U.S. Logistics Fund [Member]
Business Acquisition [Line Items]
Square footage of development property Contributed			4,200,000
Number of properties under development			40
Prologis China Logistics Venture [Member]
Business Acquisition [Line Items]
Square footage of development property Contributed			600,000
Number of properties under development			4
Prologis Europe Logistics Fund [Member]
Business Acquisition [Line Items]
Square footage of development property Contributed			700,000
Number of properties under development			4
Japan [Member]
Business Acquisition [Line Items]
Number of buildings related to repairs			1
Maximum [Member]
Business Acquisition [Line Items]
Operating leases lease term			61 years
Minimum [Member]
Business Acquisition [Line Items]
Operating leases lease term			1 year
Merger [Member]
Business Acquisition [Line Items]
Number of real estate properties			628	220
Acreage of land held for development			2,234
Number of properties under development			8	10
Square footage of under developed property			2,500,000
Square footage of industrial property			76,100,000	50,200,000
PEPR [Member]
Business Acquisition [Line Items]
Number of real estate properties			8
Square footage of under developed property			1,500,000
Gain from the consolidation of PEPR			85,900,000
Real Estate (Textual) [Abstract]
Business acquisition purchase price			1,626,900,000
Pre-Stabilized Completed Properties [Member]
Business Acquisition [Line Items]
Number of properties under development			4
Square footage of under developed property			2,300,000
Real estate properties [Member]
Business Acquisition [Line Items]
Impairment Charges			$ 23,900,000	$ 824,300,000	$ 331,600,000
Development Portfolio [Member]
Business Acquisition [Line Items]
Number of properties under development			26
Square footage of under developed property			7,200,000