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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
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Dec. 31, 2014
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Dec. 31, 2013
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Carrying Value of Debt |
$ 9,380,199us-gaap_DebtAndCapitalLeaseObligations |
$ 9,011,216us-gaap_DebtAndCapitalLeaseObligations |
| Fair Value of Debt |
10,080,157us-gaap_DebtInstrumentFairValue |
9,586,791us-gaap_DebtInstrumentFairValue |
| Credit Facilities [Member] |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Carrying Value of Debt |
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725,483us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember |
| Fair Value of Debt |
|
725,679us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember |
| Senior Notes [Member] |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Carrying Value of Debt |
6,076,920us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember |
5,357,933us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember |
| Fair Value of Debt |
6,593,657us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember |
5,698,864us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember |
| Exchangeable Senior Notes [Member] |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Carrying Value of Debt |
456,766us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember |
438,481us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember |
| Fair Value of Debt |
511,931us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember |
514,381us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember |
| Secured Mortgage Debt [Member] |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Carrying Value of Debt |
1,050,591us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember |
1,696,597us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember |
| Fair Value of Debt |
1,173,488us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember |
1,840,829us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember |
| Secured Mortgage Debt of Consolidated Entities [Member] |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Carrying Value of Debt |
1,207,106us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= pld_SecuredDebtConsolidatedInvesteesMember |
239,992us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= pld_SecuredDebtConsolidatedInvesteesMember |
| Fair Value of Debt |
1,209,271us-gaap_DebtInstrumentFairValue
/ us-gaap_DebtInstrumentAxis
= pld_SecuredDebtConsolidatedInvesteesMember |
246,324us-gaap_DebtInstrumentFairValue
/ us-gaap_DebtInstrumentAxis
= pld_SecuredDebtConsolidatedInvesteesMember |
| Term Loans and Other Debt [Member] |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Carrying Value of Debt |
588,816us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= pld_TermDebtAndOtherMember |
552,730us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= pld_TermDebtAndOtherMember |
| Fair Value of Debt |
$ 591,810us-gaap_DebtInstrumentFairValue
/ us-gaap_DebtInstrumentAxis
= pld_TermDebtAndOtherMember |
$ 560,714us-gaap_DebtInstrumentFairValue
/ us-gaap_DebtInstrumentAxis
= pld_TermDebtAndOtherMember |