Unconsolidated Entities - Summary of Remaining Equity Commitments (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 2,313
Prologis [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	281
Venture Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	2,032
Prologis Targeted U.S. Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 277
Expiration date for remaining commitments range start	2015
Expiration date for remaining commitments range end	2016
Prologis Targeted U.S. Logistics Fund [Member] | Venture Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 277
Prologis Targeted Europe Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 411	[1]
Expiration date for remaining commitments range start	2015	[1]
Expiration date for remaining commitments range end	2017	[1]
Prologis Targeted Europe Logistics Fund [Member] | Venture Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 411	[1]
Prologis European Properties Fund II [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 93	[1]
Expiration date for remaining commitments range start	2015	[1]
Expiration date for remaining commitments range end	2016	[1]
Prologis European Properties Fund II [Member] | Prologis [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 15	[1]
Prologis European Properties Fund II [Member] | Venture Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	78	[1]
Prologis European Logistics Partners Sarl [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 104	[2]
Expiration date for remaining commitments	2016-02	[2]
Prologis European Logistics Partners Sarl [Member] | Prologis [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 52	[2]
Prologis European Logistics Partners Sarl [Member] | Venture Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	52	[2]
Prologis China Logistics Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 1,428
Expiration date for remaining commitments earliest	2015
Expiration date for remaining commitments latest	2017
Prologis China Logistics Venture [Member] | Prologis [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 214
Prologis China Logistics Venture [Member] | Venture Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 1,214

[1] Equity commitments are denominated in euro and reported in U.S. dollars based on an exchange rate of $1.12 U.S. dollars to the euro.

[2] The equity commitments for this venture are expected to fund the future repayment of debt that is denominated in British pounds sterling. The commitments will be called in euros and are reported in U.S. dollars using an exchange rate of $1.52 U.S. dollars to British pounds sterling.