Noncontrolling Interests - Noncontrolling Interest Summary (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Noncontrolling Interest [Line Items]
Parent Company's Ownership Percentage		100.00%
Operating Partnership noncontrolling interest		$ 2,660,242	$ 3,072,469
Noncontrolling interests		3,074,583	3,467,059
Total Assets		29,481,075	30,249,932
Total Liabilities		10,775,334	11,791,792
Non-controlling Interests [Member]
Noncontrolling Interest [Line Items]
Total Assets		6,836,957	9,678,752
Total Liabilities		$ 314,492	$ 1,871,094
Prologis US Logistics Venture [Member]
Noncontrolling Interest [Line Items]
Parent Company's Ownership Percentage		55.00%	55.00%
Operating Partnership noncontrolling interest		$ 2,581,629	$ 2,424,800
Total Assets		6,030,819	6,201,278
Total Liabilities		284,162	$ 797,593
Prologis North American Industrial Fund [Member]
Noncontrolling Interest [Line Items]
Parent Company's Ownership Percentage	[1]		66.10%
Operating Partnership noncontrolling interest	[1]	0	$ 486,648
Total Assets	[1]	0	2,479,072
Total Liabilities	[1]	0	$ 1,038,708
Prologis Brazil Logistics Partners Fund I [Member]
Noncontrolling Interest [Line Items]
Parent Company's Ownership Percentage	[2]		50.00%
Operating Partnership noncontrolling interest	[2]	0	$ 61,836
Total Assets	[2]	0	131,581
Total Liabilities	[2]	$ 0	$ 720
Other Consolidated Entities [Member]
Noncontrolling Interest [Line Items]
Parent Company's Ownership	[3]	various	various
Operating Partnership noncontrolling interest	[3]	$ 78,613	$ 99,185
Total Assets	[3]	806,138	866,821
Total Liabilities	[3]	30,330	34,073
Prologis, L.P. [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests		2,660,242	3,072,469
Total Assets		29,481,075	30,249,932
Total Liabilities		10,775,334	11,791,792
Prologis, L.P. [Member] | Non-controlling Interests [Member]
Noncontrolling Interest [Line Items]
Limited partners in Prologis, L.P.	[4],[5]	414,341	394,590
Total Assets	[4],[5]	0	0
Total Liabilities	[4],[5]	0	0
Prologis Inc [Member]
Noncontrolling Interest [Line Items]
Total Assets		6,836,957	9,678,752
Total Liabilities		314,492	1,871,094
Prologis Inc [Member] | Non-controlling Interests [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests		$ 3,074,583	$ 3,467,059

[1] In March 2017, we acquired all our partner’s interest for $710.2 million. The difference between the amount we paid and the noncontrolling interest balance was recorded to Additional Paid-in Capital with no gain or loss recognized. In July 2017, we contributed substantially all the assets formerly owned by NAIF to our unconsolidated co-investment venture, USLF.

[2] In March 2017, we acquired all our partner’s interest for $79.8 million. The difference between the amount we paid and the noncontrolling interest balance was recorded to Additional Paid-in Capital with no gain or loss recognized. At December 31, 2016, the assets of the Prologis Brazil Logistics Partners Fund I were primarily investments in unconsolidated entities of $113.1 million, most of which we gained control of and began consolidating in August 2017. See Note 4 for more information on the acquisition of our partner’s interest in certain joint ventures in Brazil.

[3] This line item includes our two partnerships that have issued limited partnership units to third parties, as discussed above, along with various other consolidated entities. The limited partnership units outstanding at December 31, 2017 and 2016 were exchangeable into cash or, at our option, 1.0 million and 1.8 million shares of the Parent’s common stock with a fair value of $64.3 million and $96.9 million, respectively, based on the closing stock price of the Parent’s common stock. In 2017, limited partnership units were exchanged for 0.8 million shares of the Parent’s common stock. All of these outstanding limited partnership units receive quarterly cash distributions equal to the quarterly dividends paid on our common stock pursuant to the terms of the applicable partnership agreements.

[4] At December 31, 2017 and 2016, excluding the Class A Units, there were limited partnership units in the OP that were exchangeable into cash or, at our option, 4.1 million and 4.6 million shares of the Parent’s common stock with a fair value of $266.1 million and $241.8 million, respectively, based on the closing stock price of the Parent’s common stock.

[5] We had 8.9 million Class A Units that were convertible into 8.5 million and 8.7 million limited partnership units of the OP at December 31, 2017 and 2016, respectively. See Note 11 for further discussion of our Class A Units.