Cash Incentive Award Forfeited If Shareholder Return Not Become Positive During Period

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Cash incentives awards granted amount maximum.

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Cash incentives awards granted amount under performance pool.

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Percentage added to earned amount under plan

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Percentage of Actual Promotes Received Under Compensation Pool

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Percentage of excess award amount.

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Percentage Of Market Capitalization Provided To Participants Of Plan

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Percentage of performance pool over excess value under plan.

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Performance period.

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Share based compensation arrangement by share based payment award equity instruments other than options aggregate grant date fair value.

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Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Remaining Contractual Terms

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Vesting percentage on defined contribution plan.

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Vesting period for acquired plan

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate number of common shares reserved for future issuance.

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- Definition

Describe the conversion features of common stock if such stock is convertible. That is, shares of common stock into which another convertible security was converted, or shares of common stock into which another class of common stock was converted.

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Amount of cost for defined contribution plan.

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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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Percentage employer matches of the employee's percentage contribution matched.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Net number of share options (or share units) granted during the period.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Long-Term Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options outstanding	700,000
Stock options exercisable	700,000
Stock options outstanding, weighted average exercise price	$ 24.68
Stock options exercisable, weighted average exercise price	$ 24.68
Weighted average life	2 years
Aggregate intrinsic value of exercised options	$ 28,600,000	$ 45,600,000	$ 13,700,000
Options granted	0
Employer contribution for every dollar	0.50%
Percentage of employees annual compensation within the statutory compensation limit	6.00%
Vesting percentage on defined contribution plan	100.00%
Vesting period for acquired plan	1 year
Compensation cost related to employees contribution plans	$ 2,800,000	2,700,000	2,500,000
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Remaining compensation cost weighted average period	10 months 24 days
Vesting period	3 years
Grant date fair value of stock awards granted		32,500,000	30,900,000
Aggregate fair value		33,700,000	39,300,000
Compensation cost	$ 31,600,000
Long Term Incentive Plan Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grant date fair value of stock awards granted		38,000,000	27,300,000
Aggregate fair value		$ 18,800,000	$ 11,700,000
LTIP Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Remaining compensation cost weighted average period	1 year
Compensation cost	$ 50,600,000
2012 Long Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available to be granted for a single participant	1,500,000
Number of common stocks are reserved for issuance	27,200,000
Common stock available for future issuance	17,200,000
Description of conversion rate	0
Prologis Out-Performance Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance Period	3 years
Outperformance hurdle, above MSCI U.S. REIT Index	1.00%
Performance pool as percentage of excess value, if outperformance hurdle is met	3.00%
Cash incentive award maximum	$ 75,000,000
Percentage of equity market capitalization	0.50%
Forfeited awards after seven years	7 years
Total remaining compensation cost related to the POP	$ 22,900,000
Remaining compensation cost weighted average period	1 year 1 month 6 days
Prologis Out-Performance Plan [Member] \| 2016 – 2018 Performance Period [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance Period	3 years
Aggregate of performance pool award	$ 75,000,000
Percentage of excess award amount	33.30%
Prologis Promote Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total compensation pool	40.00%