v2.4.1.9

Financial Instruments and Fair Value Measurements - Schedule of Fair Value of Derivative Instruments (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Mar. 31, 2013 | Dec. 31, 2014
Derivatives, Fair Value [Line Items] |  |
Loss related to interest rate swap reclassified from accumulated other comprehensive loss | $ 7.8 us-gaap_InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet |
Foreign Currency Options - Euro Denominated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Gains on foreign exchange transactions |  | $ 7.7 pld_GainsLossesOnInvestmentAndForeignExchange / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_ForeignCurrencyOptionsEuroDenominatedMember

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- Definition Gains Losses On Investment And Foreign Exchange + References No definition available. + Details
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Namespace Prefix: | pld_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Definition The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |