Unconsolidated Entities - Summary of Remaining Equity Commitments (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Prologis [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	$ 147.7
Venture Partners [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	825.8
Prologis Targeted U.S. Logistics Fund [Member] | Venture Partners [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	30.0
Prologis SGP Mexico [Member] | Prologis [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	24.6
Prologis SGP Mexico [Member] | Venture Partners [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	98.1
Europe Logistics Venture 1 [Member] | Prologis [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	54.5
Europe Logistics Venture 1 [Member] | Venture Partners [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	309.0
Prologis China Logistics Venture 1 [Member] | Prologis [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	68.6
Prologis China Logistics Venture 1 [Member] | Venture Partners [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	$ 388.7