Financial Instruments and Fair Value Measurements - Derivative Activity (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Contract	Mar. 31, 2012 Contract
Derivative [Line Items]
Number of swap contracts	12
Notional value of swap contracts settled	$ 319.9
Acquired contracts		71.0
Number of interest rate contracts acquired		1
Prologis European Logistics Partners [Member]
Derivative [Line Items]
Notional value of swap contracts settled	383.9
Notional value of swap contracts contributed	13
Nippon Prologis REIT Inc [Member]
Derivative [Line Items]
Number of swap contracts	5
Notional value of swap contracts settled	$ 526.4