Impairment Charges (Details Textual) (USD $)	1 Months Ended	12 Months Ended					12 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2011 Parcels UnconsolidatedInvestees	Dec. 31, 2011 Land_Position UnconsolidatedInvestees	Dec. 31, 2011 Parcels UnconsolidatedInvestees	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Prologis North American Industrial Fund [Member] UnconsolidatedInvestees	Dec. 31, 2010 North America [Member]	Dec. 31, 2010 Europe [Member]	Dec. 31, 2011 Land Parcels [Member]	Dec. 31, 2010 Land Parcels [Member]	Dec. 31, 2009 Land Parcels [Member]	Dec. 31, 2010 Operating Properties [Member]	Dec. 31, 2011 Operating Properties [Member] South Korea [Member]
Property, Plant and Equipment [Line Items]
Assets held for sale impairment charge										$ 687,600,000	$ 137,000,000	$ 77,400,000	$ 2,700,000
Impairment charges	21,200,000	21,200,000	21,200,000									168,800,000
Impairment of Real Estate Properties									2,100,000			47,100,000	10,300,000
Impairment of goodwill and other assets			126,432,000	412,745,000	163,644,000							44,300,000
Net gains on dispositions, net of impairment charges, included in discontinued operations			61,830,000	234,574,000	264,779,000
Impairment of goodwill				368,451,000			235,500,000	132,900,000
Number of land parcels exchanged	3	3	3
Impairment of note receivable				2,900,000					20,500,000
Number of unconsolidated investees	2	2	2			1
Impairment Charges (Textual) [Abstract]
Impairment charges of other assets	103,800,000	103,800,000	103,800,000	44,300,000
Impairment of investments in joint ventures				$ 41,400,000