Unconsolidated Entities - Summary of Remaining Equity Commitments (Parenthetical) (Detail)	Dec. 31, 2017 $ / € $ / £
Prologis European Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Exchange rate \| $ / €	1.20
Prologis U.K. Logistics Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Exchange rate \| $ / £	1.35

Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant