Noncontrolling Interests - Additional Information (Detail)	9 Months Ended
Sep. 30, 2018
Prologis, L.P. [Member]
Noncontrolling Interest [Line Items]
Description of conversion rate	One share of common stock to one unit

Description of basis for conversion of convertible common stock.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration