Equity commitments.

No definition available.

Name:	pld_EquityCommitments
Namespace Prefix:	pld_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long-Term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. This does not include advances to clients.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04.2)
-URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6812-107765

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_EquityMethodInvestmentAggregateCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainLossOnSaleOfProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

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))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_RealEstateInvestmentPropertyAtCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pld_PropertiesUnderDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=pld_OtherAmericasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis=pld_BrazilJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=pld_PrologisTargetedEuropeanLogisticsFundMember
Namespace Prefix:
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- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=pld_PrologisTargetedUSLogisticsFundMember
Namespace Prefix:
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- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=pld_EuropeLogisticsVentureOneMember
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- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=pld_PrologisUnitedKingdomLogisticsVentureMember
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Data Type:	na
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- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pld_StabilizedPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pld_StabilizedPropertiesAndPropertiesUnderDevelopmentAndLandMember
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Unconsolidated Entities - Summary of Operating Information and Financial Position of Unconsolidated Co-investment Ventures (Parenthetical) (Detail) $ in Thousands, € in Millions, £ in Millions	1 Months Ended			9 Months Ended	12 Months Ended
	Jan. 31, 2017 USD ($)	Apr. 30, 2016 USD ($)	Apr. 30, 2016 EUR (€)	Sep. 30, 2017 USD ($) ft² a Buildings	Dec. 31, 2016 USD ($) ft² a Buildings	Sep. 30, 2017 GBP (£) ft² a Buildings	Aug. 31, 2017 ft² Property	Jul. 31, 2017 ft² Property	Feb. 28, 2017 GBP (£)
Schedule Of Equity Method Investments [Line Items]
Deferred gain recognize				$ 667,700	$ 469,900
Additional costs associated with investment in a venture				106,300	124,100
Advances to venture				195,200	166,100
Equity commitments				76,000					£ 57.0
Aggregate sales price of real estate properties				$ 25,977,157	$ 27,119,330
Properties Under Development [Member]
Schedule Of Equity Method Investments [Line Items]
Number of operating properties owned \| Buildings				55	60	55
Square feet \| ft²				22,189,000	19,539,000	22,189,000
Aggregate sales price of real estate properties				$ 1,059,764	$ 633,849
Land [Member]
Schedule Of Equity Method Investments [Line Items]
Square feet \| a				5,871	5,892	5,871
Aggregate sales price of real estate properties				$ 1,313,268	$ 1,218,904
Other Americas [Member] \| Brazil Joint Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Number of operating properties owned \| Property							9
Square feet \| ft²							2,800,000
Prologis Targeted European Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Redeemed a portion of investment		$ 210,600	€ 185.0
Prologis Targeted U S Logistics Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership percentage								27.10%
Redeemed a portion of investment		$ 200,000
Number of operating properties owned \| Property								190
Square feet \| ft²								37,100,000
Europe Logistics Venture 1 [Member]
Schedule Of Equity Method Investments [Line Items]
Redeemed a portion of investment	$ 84,300
Prologis U.K. Logistics Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership percentage									15.00%
Equity commitments				$ 508,900					£ 380.0
Prologis U.K. Logistics Venture [Member] \| Stabilized Properties [Member]
Schedule Of Equity Method Investments [Line Items]
Square feet \| ft²				1,400,000		1,400,000
Prologis U.K. Logistics Venture [Member] \| Stabilized Properties, Properties under Development and Land [Member]
Schedule Of Equity Method Investments [Line Items]
Aggregate sales price of real estate properties				$ 336,400		£ 269.5
Prologis U.K. Logistics Venture [Member] \| Properties Under Development [Member]
Schedule Of Equity Method Investments [Line Items]
Square feet \| ft²				600,000		600,000
Prologis U.K. Logistics Venture [Member] \| Land [Member]
Schedule Of Equity Method Investments [Line Items]
Square feet \| a				144.8		144.8