Unconsolidated Entities - Summary of Unconsolidated Co-investment Ventures (Detail) $ in Thousands, ft² in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015 USD ($) ft² Property Venture	Sep. 30, 2014 USD ($) ft² Property Venture	Sep. 30, 2015 USD ($) ft² Property Venture	Sep. 30, 2014 USD ($) ft² Property Venture	Dec. 31, 2014 USD ($) ft² Property Venture
Schedule Of Equity Method Investments [Line Items]
Number of ventures | Venture		9	10	9	10	9
Number of properties owned | Property		1,342	1,494	1,342	1,494	1,278
Square feet | ft²		275.0	301.8	275.0	301.8	260.7
Total assets		$ 22,852,000	$ 25,714,000	$ 22,852,000	$ 25,714,000	$ 22,661,000
Third-party debt		6,558,000	7,865,000	6,558,000	7,865,000	6,576,000
Total liabilities		7,901,000	9,291,000	7,901,000	9,291,000	7,694,000
Our investment balance	[1]	4,631,000	5,641,000	4,631,000	5,641,000	$ 4,666,000
Revenues		458,561	525,671	1,364,449	1,509,774
Net operating income		358,008	408,027	1,055,385	1,159,650
Net earnings		$ 94,162	$ 85,450	$ 302,270	$ 244,665
Americas [Member]
Schedule Of Equity Method Investments [Line Items]
Number of ventures | Venture		3	4	3	4	3
Number of properties owned | Property		602	814	602	814	590
Square feet | ft²		89.2	130.5	89.2	130.5	87.1
Total assets		$ 6,870,000	$ 9,396,000	$ 6,870,000	$ 9,396,000	$ 7,063,000
Third-party debt		2,025,000	3,309,000	2,025,000	3,309,000	2,280,000
Total liabilities		2,166,000	3,513,000	2,166,000	3,513,000	2,421,000
Our investment balance	[1]	1,480,000	2,371,000	1,480,000	2,371,000	$ 1,537,000
Revenues	[2]	152,196	204,225	457,048	551,153
Net operating income	[2]	118,146	154,415	347,616	405,900
Net earnings	[2]	$ 33,561	$ 24,362	$ 77,606	$ 16,792
Europe [Member]
Schedule Of Equity Method Investments [Line Items]
Number of ventures | Venture		4	4	4	4	4
Number of properties owned | Property		683	629	683	629	636
Square feet | ft²		158.5	145.3	158.5	145.3	147.4
Total assets		$ 11,734,000	$ 11,952,000	$ 11,734,000	$ 11,952,000	$ 11,463,000
Third-party debt		2,786,000	2,798,000	2,786,000	2,798,000	2,644,000
Total liabilities		3,766,000	3,823,000	3,766,000	3,823,000	3,524,000
Our investment balance	[1]	2,796,000	2,894,000	2,796,000	2,894,000	$ 2,773,000
Revenues		237,914	250,477	702,772	749,433
Net operating income		186,779	198,011	548,705	590,856
Net earnings		$ 50,504	$ 38,708	$ 168,947	$ 166,999
Asia [Member]
Schedule Of Equity Method Investments [Line Items]
Number of ventures | Venture		2	2	2	2	2
Number of properties owned | Property		57	51	57	51	52
Square feet | ft²		27.3	26.0	27.3	26.0	26.2
Total assets		$ 4,248,000	$ 4,366,000	$ 4,248,000	$ 4,366,000	$ 4,135,000
Third-party debt		1,747,000	1,758,000	1,747,000	1,758,000	1,652,000
Total liabilities		1,969,000	1,955,000	1,969,000	1,955,000	1,749,000
Our investment balance	[1],[3]	355,000	376,000	355,000	376,000	$ 356,000
Revenues		68,451	70,969	204,629	209,188
Net operating income		53,083	55,601	159,064	162,894
Net earnings		$ 10,097	$ 22,380	$ 55,717	$ 60,874
Weighted Average [Member]
Schedule Of Equity Method Investments [Line Items]
Our weighted average ownership	[4]	32.10%	35.40%	32.10%	35.40%	32.00%
Weighted Average [Member] | Americas [Member]
Schedule Of Equity Method Investments [Line Items]
Our weighted average ownership	[4]	29.70%	40.20%	29.70%	40.20%	31.00%
Weighted Average [Member] | Europe [Member]
Schedule Of Equity Method Investments [Line Items]
Our weighted average ownership	[4]	39.50%	38.80%	39.50%	38.80%	38.80%
Weighted Average [Member] | Asia [Member]
Schedule Of Equity Method Investments [Line Items]
Our weighted average ownership	[4]	15.00%	15.00%	15.00%	15.00%	15.00%

[1] The difference between our ownership interest of a venture’s equity and our investment balance results principally from three types of transactions: (i) deferring a portion of the gains we recognize from a contribution of a property to a venture ($411.2 million and $322.9 million at September 30, 2015, and December 31, 2014, respectively); (ii) recording additional costs associated with our investment in a venture; and (iii) advances to a venture.

[2] As discussed in Note 3, we formed and invested in FIBRA Prologis in June 2014. In connection with the transaction, we concluded our unconsolidated co-investment venture in Mexico. As discussed in Note 2, we began consolidating NAIF in October 2014.

[3] At September 30, 2015, and December 31, 2014, we had receivables from Nippon Prologis REIT, Inc. (“NPR”) of $86.2 million and $85.9 million, respectively, related to customer security deposits that were made through a leasing company owned by Prologis that pertain to properties owned by NPR. There is a corresponding payable to NPR’s customers in Other Liabilities in the Consolidated Balance Sheets.

[4] Represents our weighted average ownership interest in all co-investment ventures based on each entity’s contribution of total assets, before depreciation, net of other liabilities.