Description of the Business - Additional Information (Detail) shares in Millions	12 Months Ended
Dec. 31, 2018 Segment shares
Description Of Business And Basis Of Presentation [Line Items]
Number of reportable segments \| Segment	2
Unaffiliated Investors and Certain Current and Former Directors and Officers [Member]
Description Of Business And Basis Of Presentation [Line Items]
Percentage of common limited partnership interest	2.91%
General Partner \| Prologis Limited Partnership [Member]
Description Of Business And Basis Of Presentation [Line Items]
Percentage of ownership in operating partnership	97.09%
Preferred [Member] \| Prologis Limited Partnership [Member]
Description Of Business And Basis Of Presentation [Line Items]
Percentage of ownership in operating partnership	100.00%
Class A Common [Member]
Description Of Business And Basis Of Presentation [Line Items]
Class of common limited partnership units designated as class A common units \| shares	8.8

Description of business and basis of presentation line items.

No definition available.

Name:	pld_DescriptionOfBusinessAndBasisOfPresentationLineItems
Namespace Prefix:	pld_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Outstanding common limited partnership units converted into cash or common shares.

+ References

No definition available.

+ Details

Name:	pld_OutstandingCommonLimitedPartnershipUnitsExchangeableIntoCashOrCommonShares
Namespace Prefix:	pld_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

+ References

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_OwnershipAxis=pld_UnaffiliatedInvestorsAndCertainCurrentAndFormerDirectorsAndOfficersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_GeneralPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=pld_PrologisLimitedPartnershipMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PartnerCapitalComponentsAxis=pld_PreferredCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: