Unconsolidated Entities - Summary of Remaining Equity Commitments (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	$ 2,765.2
Prologis Targeted U.S. Logistics Fund [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	351.5
Prologis Targeted Europe Logistics Fund [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	281.9
Prologis European Properties Fund II [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	257.9
Europe Logistics Venture 1 [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	145.8
Prologis European Logistics Partners [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	215.6
Prologis China Logistics Venture 1 and 2 [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	1,512.5
Prologis [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	556.6
Prologis [Member] | Prologis Targeted Europe Logistics Fund [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	121.4
Prologis [Member] | Prologis European Properties Fund II [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	78.6
Prologis [Member] | Europe Logistics Venture 1 [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	21.9
Prologis [Member] | Prologis European Logistics Partners [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	107.8
Prologis [Member] | Prologis China Logistics Venture 1 and 2 [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	226.9
Venture Partners [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	2,208.6
Venture Partners [Member] | Prologis Targeted U.S. Logistics Fund [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	351.5
Venture Partners [Member] | Prologis Targeted Europe Logistics Fund [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	160.5
Venture Partners [Member] | Prologis European Properties Fund II [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	179.3
Venture Partners [Member] | Europe Logistics Venture 1 [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	123.9
Venture Partners [Member] | Prologis European Logistics Partners [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	107.8
Venture Partners [Member] | Prologis China Logistics Venture 1 and 2 [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Remaining equity commitments	$ 1,285.6