v2.4.1.9

Income Taxes - Summary of Operating Loss Carryforwards (Detail) (USD $) | 12 Months Ended |
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Dec. 31, 2014 | Dec. 31, 2013
Operating Loss Carryforwards [Line Items] |  |
Tax-effected NOL carryforward | $ 346,978,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | $ 391,764,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
United States [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Gross NOL carryforward | 92,000,000 us-gaap_OperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = country_US |
Tax-effected NOL carryforward | 35,000,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = country_US |
Valuation allowance | (35,000,000)us-gaap_OperatingLossCarryforwardsValuationAllowance / us-gaap_StatementGeographicalAxis = country_US |
Expiration periods | 2022-2033 |
Europe [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Gross NOL carryforward | 747,000,000 us-gaap_OperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Tax-effected NOL carryforward | 197,000,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Valuation allowance | (188,000,000)us-gaap_OperatingLossCarryforwardsValuationAllowance / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Net deferred tax asset-NOL carryforward | 9,000,000 pld_DeferredIncomeTaxesNetOperatingLoss / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Expiration periods | 2015-indefinite |
Mexico [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Gross NOL carryforward | 246,000,000 us-gaap_OperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = country_MX |
Tax-effected NOL carryforward | 74,000,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = country_MX |
Valuation allowance | (74,000,000)us-gaap_OperatingLossCarryforwardsValuationAllowance / us-gaap_StatementGeographicalAxis = country_MX |
Expiration periods | 2015-2025 |
Japan [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Gross NOL carryforward | 132,000,000 us-gaap_OperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = country_JP |
Tax-effected NOL carryforward | 25,000,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = country_JP |
Valuation allowance | (25,000,000)us-gaap_OperatingLossCarryforwardsValuationAllowance / us-gaap_StatementGeographicalAxis = country_JP |
Expiration periods | 2015-2023 |
Other [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Gross NOL carryforward | 67,000,000 us-gaap_OperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = pld_OtherCountriesMember |
Tax-effected NOL carryforward | 16,000,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = pld_OtherCountriesMember |
Valuation allowance | $ (16,000,000)us-gaap_OperatingLossCarryforwardsValuationAllowance / us-gaap_StatementGeographicalAxis = pld_OtherCountriesMember |
Expiration periods | 2015-indefinite |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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