v2.4.1.9

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

X

- Definition

Deferred Income Taxes Net Operating Loss

+ References

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- Definition

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+ References

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X

- 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



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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-Section 50

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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

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

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X

- Definition

The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

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