Debt instrument maturity month and year.

No definition available.

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

- Definition

Debt instrument maturity year.

+ References

No definition available.

+ Details

Name:	pld_DebtInstrumentMaturityYear
Namespace Prefix:	pld_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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+ Details

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

- Definition

The average effective interest rate during the reporting period.

+ References

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+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

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

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

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

- Definition

The cash outflow from the repayments of a long-term debt originally issued by another party but is assumed by the entity.

+ References

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-Publisher FASB
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_CurrencyAxis=currency_GBP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_CAD
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_EUR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_JPY
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- Details

Name:	srt_CurrencyAxis=currency_USD
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Debt - Debt Summary (Parenthetical) (Detail) $ in Thousands, € in Millions, ¥ in Billions	1 Months Ended				9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($)	Aug. 31, 2018 USD ($)	Jul. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2018 JPY (¥)	Jul. 31, 2018 EUR (€)
Debt Instrument [Line Items]
Weighted average interest rate					2.70%	2.90%
Debt	$ 11,232,129				$ 11,232,129	$ 9,412,631
Debt instrument, issued amount	11,305,503				11,305,503
DCT Transaction [Member]
Debt Instrument [Line Items]
Debt	$ 1,900,000				$ 1,900,000
Weighted average interest rate including noncash premium	3.40%				3.40%		3.40%
Repayments of assumed debt		$ 1,800,000
DCT Transaction [Member] \| Senior Notes Due in September 2028 through September 2048 [Member]
Debt Instrument [Line Items]
Debt instrument, issued amount	$ 488,700			$ 700,000	$ 488,700		¥ 55.1
Debt instrument, maturity date	2025-09			2028-09
Debt instrument, maturity date	2038			2048
DCT Transaction [Member] \| Senior Notes Due in September 2028 through September 2048 [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	0.70%			3.90%	0.70%		0.70%
DCT Transaction [Member] \| Senior Notes Due in September 2028 through September 2048 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	1.50%			4.40%	1.50%		1.50%
DCT Transaction [Member] \| Senior Notes Due in January 2029 [Member]
Debt Instrument [Line Items]
Debt instrument, issued amount			$ 818,700					€ 700.0
Debt instrument, interest rate			1.90%					1.90%
Debt instrument, maturity date			2029-01
GBP
Debt Instrument [Line Items]
Debt	$ 648,184				$ 648,184	671,522
CAD
Debt Instrument [Line Items]
Debt	279,184				279,184	451,080
EUR
Debt Instrument [Line Items]
Debt	5,166,017				5,166,017	3,839,422
JPY
Debt Instrument [Line Items]
Debt	1,791,824				1,791,824	1,306,380
USD
Debt Instrument [Line Items]
Debt	$ 3,346,920				$ 3,346,920	$ 3,144,227