Unconsolidated Entities - Summary of Amounts Recognized in Consolidated Statements of Income Related to Co-Investment Ventures (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Schedule Of Equity Method Investments [Line Items]
Total strategic capital revenues		$ 180,654	$ 53,535	$ 237,699	$ 104,538
Total earnings from unconsolidated co-investment ventures, net		68,596	41,454	117,201	99,765
Unconsolidated Co-Investment Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Total strategic capital revenues		180,050	52,961	235,984	103,276
Total earnings from unconsolidated co-investment ventures, net		61,165	40,934	106,615	88,126
Unconsolidated Co-Investment Ventures [Member] | U.S. [Member]
Schedule Of Equity Method Investments [Line Items]
Total strategic capital revenues	[1]	130,165	9,179	141,223	18,174
Total earnings from unconsolidated co-investment ventures, net		1,963	718	6,909	7,377
Unconsolidated Co-Investment Ventures [Member] | Other Americas [Member]
Schedule Of Equity Method Investments [Line Items]
Total strategic capital revenues	[1]	9,864	5,693	15,915	11,079
Total earnings from unconsolidated co-investment ventures, net		8,933	7,509	15,503	12,808
Unconsolidated Co-Investment Ventures [Member] | Europe [Member]
Schedule Of Equity Method Investments [Line Items]
Total strategic capital revenues		25,957	25,435	52,127	47,768
Total earnings from unconsolidated co-investment ventures, net		35,859	29,014	65,764	60,593
Unconsolidated Co-Investment Ventures [Member] | Asia [Member]
Schedule Of Equity Method Investments [Line Items]
Total strategic capital revenues		14,064	12,654	26,719	26,255
Total earnings from unconsolidated co-investment ventures, net		$ 14,410	$ 3,693	$ 18,439	$ 7,348

[1] In June 2017, we earned promotes from USLF based on the venture’s cumulative returns to its investors over the last three years and FIBRA Prologis based on the venture’s cumulative returns to its investors over the past year. The third parties’ share of the promotes that were recognized in Strategic Capital Revenues were $123.9 million.