v2.4.0.6
Real Estate (Details Textual) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2012
sqft
acre
Property
Jun. 30, 2011
Jun. 30, 2012
Buildings
sqft
acre
Property
Jun. 30, 2011
Dec. 31, 2011
sqft
Property
acre
Business Acquisition [Line Items]          
Number of real estate properties 1,927   1,927   1,797
Net investments in properties $ 24,166,196,000   $ 24,166,196,000   $ 22,629,630,000
Real Estate (Textual) [Abstract]          
Square footage of industrial property     328,000,000   291,100,000
Total expected investment upon completion of the properties under development 1,000,000,000   1,000,000,000    
Acreage of land held for development 10,508   10,508   10,723
Acquisition acres of land 167   167    
Total purchase amount of land     74,823,000 64,749,000  
Gains on acquisitions and dispositions of investments in real estate, net 520,000 102,529,000 268,291,000 106,254,000  
Number of operating buildings acquired     8    
Square feet of operating buildings 900,000   900,000    
Payments to Acquire Buildings     42,500,000    
Square feet of properties 100,000   100,000    
Impairment of other assets   (103,823,000) (16,135,000) (103,823,000)  
Pre-Stabilized Completed Properties [Member]
          
Business Acquisition [Line Items]          
Number of properties under development 29   29   30
Development Portfolio [Member]
          
Business Acquisition [Line Items]          
Square footage of under developed property 10,600,000   10,600,000   9,500,000
Prologis California [Member]
          
Real Estate (Textual) [Abstract]          
Gains on acquisitions and dispositions of investments in real estate, net     273,000,000    
Quarter One Venture Acquisition [Member]
          
Business Acquisition [Line Items]          
Number of real estate properties 180   180    
Net investments in properties $ 2,100,000,000   $ 2,100,000,000