Unconsolidated Entities - Information About Investments in Property Funds (Parenthetical) (Detail) In Millions, unless otherwise specified	12 Months Ended					12 Months Ended			12 Months Ended
	Dec. 31, 2012 USD ($) Partner Investor Venture	Dec. 31, 2011 USD ($) Venture	Dec. 31, 2012 Unconsolidated Co-Investment Ventures [Member] USD ($)	Dec. 31, 2012 Prologis North American Industrial Fund [Member] USD ($) Property Venture	Dec. 31, 2012 Prologis Mexico Industrial Fund [Member] Venture	Dec. 31, 2012 Prologis Targeted European Logistics Fund [Member] USD ($) sqft Property	Dec. 31, 2012 Prologis Targeted U.S. Logistics Fund [Member] USD ($) sqft Property	Dec. 31, 2012 Prologis Brazil Logistics Partners Fund and related joint ventures [Member]	Dec. 31, 2012 Prologis European Properties Fund II [Member] USD ($) sqft Property	Dec. 31, 2012 Prologis Europe Logistics Venture [Member] USD ($) Property sqft	Dec. 31, 2012 Prologis Europe Logistics Venture [Member] EUR (€)	Dec. 31, 2012 Prologis Europe Logistics Venture [Member] Unconsolidated Co-Investment Ventures [Member] USD ($) sqft Property	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Minimum [Member] Prologis Brazil Logistics Partners Fund and related joint ventures [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Maximum [Member] Prologis Brazil Logistics Partners Fund and related joint ventures [Member]
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Gain (Loss ) on disposition of property		$ 4.4		$ 13.5		$ 1.7	$ 2.1		$ 3.7
Number of disposed Properties				12			9
Number of institutional investors	9
Number of Co investment Ventures	3	7		1	1
Number of fund partner	1
Number of acquired property from third party							26		4
Area of acquired property							3,100,000		700,000	400,000	400,000	400,000
Increase of preferred investment in property fund							201.6
Percentage of equity interest holds in unconsolidated joint venture	50.00%
Ownership Percentage in property fund								50.00%					15.00%	5.00%	50.00%	50.00%
Number of properties contributed to venture						3			13	9	9	1
Area of development properties						600,000			2,200,000	1,900,000	1,900,000
Proceeds from co-investment venture	185.9					7.4
Number of properties disposed						3			11
Amount of acquisition									36.3
Number of third parties investors	20
Number of Properties acquired by co-investment venture										2	2
Payment for properties Acquired			92.5							24.0
Equity method investment contribution										178.6	136.0
Equity method investment partner contribution										26.8	20.4
Proceeds on properties										$ 148.5		$ 25.8