Noncontrolling Interests - Noncontrolling Interest Summary (Detail) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Noncontrolling Interest [Line Items]
Operating Partnership noncontrolling interest		$ 2,643,034	$ 2,660,242
Noncontrolling interests		3,108,045	3,074,583
Total Assets		29,671,485	29,481,075	$ 29,481,075
Total Liabilities		10,883,365	10,775,334
Non-controlling Interests [Member]
Noncontrolling Interest [Line Items]
Total Assets		6,815,051	6,836,957
Total Liabilities		$ 323,245	$ 314,492
Prologis US Logistics Venture [Member]
Noncontrolling Interest [Line Items]
Parent Company's Ownership Percentage		55.00%	55.00%
Operating Partnership noncontrolling interest		$ 2,565,165	$ 2,581,629
Total Assets		5,999,624	6,030,819
Total Liabilities		$ 292,833	$ 284,162
Other Consolidated Entities [Member]
Noncontrolling Interest [Line Items]
Parent Company's Ownership	[1]	various	various
Operating Partnership noncontrolling interest	[1]	$ 77,869	$ 78,613
Total Assets	[1]	815,427	806,138
Total Liabilities	[1]	30,412	30,330
Prologis, L.P. [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests		2,643,034	2,660,242
Total Assets		29,671,485	29,481,075
Total Liabilities		10,883,365	10,775,334
Prologis, L.P. [Member] | Non-controlling Interests [Member]
Noncontrolling Interest [Line Items]
Limited partners in Prologis, L.P.	[2],[3]	465,011	414,341
Total Assets	[2],[3]	0	0
Total Liabilities	[2],[3]	0	0
Prologis Inc [Member]
Noncontrolling Interest [Line Items]
Total Assets		6,815,051	6,836,957
Total Liabilities		323,245	314,492
Prologis Inc [Member] | Non-controlling Interests [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests		$ 3,108,045	$ 3,074,583

[1] 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 March 31, 2018 and December 31, 2017 were exchangeable into cash or, at our option, 1.0 million shares of the Parent’s common stock.

[2] At March 31, 2018 and December 31, 2017, excluding the Class A Units, there were limited partnership units in the OP that were exchangeable into cash or, at our option, 3.9 million shares and 4.1 million shares of the Parent’s common stock

[3] We had 8.9 million Class A Units that were convertible into 8.5 million limited partnership units of the OP at March 31, 2018 and December 31, 2017, respectively.