Noncontrolling Interests - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Prologis Institutional Alliance Fund II [Member]	Sep. 30, 2013 Prologis Institutional Alliance Fund II [Member]
Noncontrolling Interest [Line Items]
Description of conversion rate	One share of common stock to one unit
Percentage of co-investment	less than 100%
Net earnings attributable to noncontrolling interest	$ 3.1
(Loss) from continuing operations	(4.6)
Income from discontinued operations	7.7
Payment to acquire partners' interest			245.8
Number of limited partnership units issued	1,949,501	1,173,571	804,734	804,734
Amount of partnership units issued			31.3
Earnings from the fund			18.8
Earnings attributable to noncontrolling interest				13.5
Investment management expenses				$ 3.0
Common partnership units of operating partnership owned by REIT	99.63%