Debt instrument maturity month and year.

No definition available.

Name:	pld_DebtInstrumentMaturityMonthAndYear
Namespace Prefix:	pld_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the debt instrument was issued, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DebtInstrumentIssuanceDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

+ Details

Name:	us-gaap_UnamortizedDebtIssuanceExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=pld_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=pld_TwentySixteenYenSeniorTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_JPY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=pld_TwentySeventeenSeniorTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=pld_OtherCurrencyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=pld_MarchTwentySeventeenYenSeniorTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=pld_CanadianNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_CAD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=pld_OctoberTwentySeventeenYenSeniorTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=pld_MarchTwentySeventeenYenSeniorTermLoanTrancheOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=pld_MarchTwentySeventeenYenSeniorTermLoanTrancheTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=pld_TwentySixteenYenSeniorTermLoanTrancheOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=pld_TwentySixteenYenSeniorTermLoanTrancheTwoMember
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Debt - Summary of Outstanding Term Loans (Detail)	12 Months Ended
Debt - Summary of Outstanding Term Loans (Detail)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 JPY (¥)	Dec. 31, 2017 CAD	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 3,490,000,000			$ 3,306,000,000	$ 2,662,000,000
Debt issuance costs, net	(39,802,000)
Total	317,000,000			35,000,000
Term Loan [Member]
Debt Instrument [Line Items]
Subtotal	2,057,987,000			1,494,672,000
Debt issuance costs, net	(11,042,000)			(10,149,000)
Total	$ 2,046,945,000			1,484,523,000
2016 Yen Term Loan [Member] \| JPY
Debt Instrument [Line Items]
Initial Borrowing Date	Aug. 31, 2016
Credit facility maximum borrowing capacity	$ 1,065,965,000	¥ 120,000,000,000
Subtotal	$ 1,065,965,000			1,025,057,000
Interest Rate, Description	Yen LIBOR plus 0.65%
Interest rate	0.65%
2017 Term Loan [Member] \| Other Currency [Member]
Debt Instrument [Line Items]
Initial Borrowing Date	Jun. 30, 2014
Credit facility maximum borrowing capacity	$ 500,000,000
Subtotal	$ 500,000,000			193,293,000
Interest Rate, Description	LIBOR plus 0.90%
Interest rate	0.90%
Debt Instrument maturity date	2020-05
March 2017 Yen Term Loan [Member] \| JPY
Debt Instrument [Line Items]
Initial Borrowing Date	Mar. 31, 2017
Credit facility maximum borrowing capacity	$ 106,597,000	12,000,000,000
Subtotal	$ 106,597,000			0
Interest Rate, Description	0.92% and 1.01%
2015 Canadian Term Loan [Member] \| CAD
Debt Instrument [Line Items]
Initial Borrowing Date	Dec. 31, 2015
Credit facility maximum borrowing capacity	$ 296,595,000		CAD 371,925,000
Subtotal	$ 296,595,000			276,322,000
Interest Rate, Description	CDOR rate plus 1.50%
Interest rate	1.50%
Debt Instrument maturity date	2023-02
October 2017 Yen Term Loan [Member] \| JPY
Debt Instrument [Line Items]
Initial Borrowing Date	Oct. 31, 2017
Credit facility maximum borrowing capacity	$ 88,830,000	¥ 10,000,000,000
Subtotal	$ 88,830,000			$ 0
Interest Rate, Description	0.85%
Interest rate	0.85%
Debt Instrument maturity date	2032-10
March 2017 Yen Term Loan Tranche One [Member] \| JPY
Debt Instrument [Line Items]
Interest rate	0.92%
Debt Instrument maturity date	2027-03
March 2017 Yen Term Loan Tranche Two [Member] \| JPY
Debt Instrument [Line Items]
Interest rate	1.01%
Debt Instrument maturity date	2028-03
2016 Yen Term Loan Tranche One [Member] \| JPY
Debt Instrument [Line Items]
Debt Instrument maturity date	2022-08
2016 Yen Term Loan Tranche Two [Member] \| JPY
Debt Instrument [Line Items]
Debt Instrument maturity date	2023-08