Unconsolidated Entities - Summary of Remaining Equity Commitments (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 3,271
Prologis Targeted U S Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 73
Expiration date for remaining commitments range start	2019
Prologis European Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 1,061	[1]
Expiration date for remaining commitments range start	2018	[1]
Expiration date for remaining commitments range end	2019	[1]
Prologis U.K. Logistics Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 178	[2]
Expiration date for remaining commitments range start	2021	[2]
Prologis China Logistics Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 1,959
Expiration date for remaining commitments range start	2020
Expiration date for remaining commitments range end	2024
Prologis Inc [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 321
Prologis Inc [Member] | Prologis Targeted U S Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	0
Prologis Inc [Member] | Prologis European Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	0	[1]
Prologis Inc [Member] | Prologis U.K. Logistics Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	27	[2]
Prologis Inc [Member] | Prologis China Logistics Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	294
Venture Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	2,950
Venture Partners [Member] | Prologis Targeted U S Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	73
Venture Partners [Member] | Prologis European Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	1,061	[1]
Venture Partners [Member] | Prologis U.K. Logistics Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	151	[2]
Venture Partners [Member] | Prologis China Logistics Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining equity commitments	$ 1,665

[1] During 2017, the remaining equity commitments of PTELF were transferred to PELF when the assets and related liabilities of PTELF were contributed to PEPF II, and PEPF II was renamed PELF. Equity commitments are denominated in euro and reported in U.S. dollars based on an exchange rate of $1.20 U.S. dollars to the euro.

[2] Equity commitments are denominated in British pounds sterling and reported in U.S. dollars based on an exchange rate of $1.35 U.S. dollars to the British pound sterling.