Noncontrolling Interests - Noncontrolling Interest Summary (Parenthetical) (Detail) - USD ($) shares in Thousands, $ in Millions	9 Months Ended
Sep. 30, 2015	Dec. 31, 2014
Noncontrolling Interest [Line Items]
Outstanding limited partnership units	1,835	1,887
Prologis Brazil Logistics Partners Fund I [Member]
Noncontrolling Interest [Line Items]
Investments in unconsolidated entities	$ 101.0	$ 152.0
Prologis, L.P. [Member]
Noncontrolling Interest [Line Items]
Outstanding limited partnership units	6,554	1,767
Fair value of outstanding limited partnership units	$ 255.0	$ 76.0
Restricted Operating Partnership Units [Member]
Noncontrolling Interest [Line Items]
Number of units outstanding	941	113
KTR Capital Partners and Affiliates [Member]
Noncontrolling Interest [Line Items]
Contribution received from venture partner	$ 2,300.0
Business acquisition, common limited partnership units issued	4,500

Outstanding limited partnership units converted into cash or common shares.

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Outstanding limited partnership units exchangeable into cash or common value.

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- Definition

Number of non-vested equity instruments other than options outstanding.

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Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)(4)

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The cash inflow from the capital received in cash from a partner in a partnership during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.1(d))

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