Unconsolidated Entities - Summarized Financial Information of Co-Investment Ventures (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended			9 Months Ended				12 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 U.S, Prologis North American Industrial Fund III [Member] Property Venture	Sep. 30, 2013 U.S, Prologis North American Industrial Fund III [Member] Property Venture	Sep. 30, 2014 Nippon Prologis REIT Inc [Member]	Dec. 31, 2013 Nippon Prologis REIT Inc [Member]	Dec. 31, 2013 Prologis European Logistics Partners [Member]	Sep. 30, 2014 Fibra [Member] Venture	Sep. 30, 2014 Fibra [Member] U.S, Prologis North American Industrial Fund III [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Number of co-investment ventures				2	1				2
Number of Co-investment ventures concluded									3
Gain (Loss) on disposition of property	$ 5.56	$ 10.00		$ 16.90	$ 24.00
Number of disposed properties				14	3
Acquisition cost	16.7									37.2
Intercompany notes receivable						91.7	88.5
Proceeds of remaining sale								35.5
Guaranteed debt	$ 0		$ 0