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
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Total gain (loss) on derivative instruments | $ 115,666 us-gaap_DerivativeGainLossOnDerivativeNet | $ 37,437 us-gaap_DerivativeGainLossOnDerivativeNet | $ 536 us-gaap_DerivativeGainLossOnDerivativeNet
Total gain on derivative and non-derivative instruments | 436,862 us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings | 22,527 us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings | 536 us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings
Derivative Net Investment Hedges [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Total gain (loss) on derivative instruments | 122,164 us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_DerivativeNetInvestmentHedgesMember | 17,847 us-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 | 6,651 us-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 | 19,659 us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_UnconsolidatedCoInvestmentVenturesMember | 11,335 us-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 | $ 321,196 us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_NonDerivativeNetInvestmentHedgesMember | $ (14,910)us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = pld_NonDerivativeNetInvestmentHedgesMember |

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- Definition 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 + Details
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- Definition 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 + Details
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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 + Details
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