v2.4.1.9

Financial Instruments and Fair Value Measurements - Summary of Gains (Losses) From Change in Fair Value of Derivative Instruments Included in Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total gain (loss) on derivative instruments	$ 115,666us-gaap_DerivativeGainLossOnDerivativeNet	$ 37,437us-gaap_DerivativeGainLossOnDerivativeNet	$ 536us-gaap_DerivativeGainLossOnDerivativeNet
Total gain on derivative and non-derivative instruments	436,862us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings	22,527us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings	536us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings
Derivative Net Investment Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total gain (loss) on derivative instruments	122,164us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_DerivativeNetInvestmentHedgesMember	17,847us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_DerivativeNetInvestmentHedgesMember	(17,450)us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_DerivativeNetInvestmentHedgesMember
Interest Rate Swap Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total gain (loss) on derivative instruments	(804)us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_InterestRateSwapHedgeMember	(69)us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_InterestRateSwapHedgeMember	6,651us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_InterestRateSwapHedgeMember
Our Share of Derivatives from Unconsolidated Co-Investment Ventures [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total gain (loss) on derivative instruments	(5,694)us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_UnconsolidatedCoInvestmentVenturesMember	19,659us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_UnconsolidatedCoInvestmentVenturesMember	11,335us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_UnconsolidatedCoInvestmentVenturesMember
Non-Derivative Net Investment Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Non-derivative net investment hedges	$ 321,196us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_NonDerivativeNetInvestmentHedgesMember	$ (14,910)us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_NonDerivativeNetInvestmentHedgesMember

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (a),(c),(d),(e)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ 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 (e)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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- Definition

Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

+ 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 (a)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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