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Financial Instruments and Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying Value of Debt $ 8,641,421us-gaap_DebtAndCapitalLeaseObligations $ 9,380,199us-gaap_DebtAndCapitalLeaseObligations
Fair Value of Debt 9,338,535us-gaap_DebtInstrumentFairValue 10,080,157us-gaap_DebtInstrumentFairValue
Credit Facilities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying Value of Debt 65,372us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember		  
Fair Value of Debt 65,504us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember		  
Senior Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying Value of Debt 5,731,500us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		 6,076,920us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
Fair Value of Debt 6,301,689us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		 6,593,657us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
Exchangeable Senior Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying Value of Debt   456,766us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Fair Value of Debt   511,931us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Secured Mortgage Debt [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying Value of Debt 751,244us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 1,050,591us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember
Fair Value of Debt 865,286us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 1,173,488us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember
Secured Mortgage Debt of Consolidated Entities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying Value of Debt 1,197,920us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= pld_SecuredDebtConsolidatedInvesteesMember		 1,207,106us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= pld_SecuredDebtConsolidatedInvesteesMember
Fair Value of Debt 1,205,481us-gaap_DebtInstrumentFairValue
/ us-gaap_DebtInstrumentAxis
= pld_SecuredDebtConsolidatedInvesteesMember		 1,209,271us-gaap_DebtInstrumentFairValue
/ us-gaap_DebtInstrumentAxis
= pld_SecuredDebtConsolidatedInvesteesMember
Term Loans and Other Debt [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying Value of Debt 895,385us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= pld_TermDebtAndOtherMember		 588,816us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= pld_TermDebtAndOtherMember
Fair Value of Debt $ 900,575us-gaap_DebtInstrumentFairValue
/ us-gaap_DebtInstrumentAxis
= pld_TermDebtAndOtherMember		 $ 591,810us-gaap_DebtInstrumentFairValue
/ us-gaap_DebtInstrumentAxis
= pld_TermDebtAndOtherMember