Real Estate - Summary of Dispositions of Net Investments in Real Estate (Detail) ft² in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021 USD ($) ft² Property	Jun. 30, 2020 USD ($) ft² Property	Jun. 30, 2021 USD ($) ft² Property	Jun. 30, 2020 USD ($) ft² Property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gains on dispositions of development properties and land, net	[1]	$ 187,361	$ 86,416	$ 361,004	$ 249,166
Gains on other dispositions of investments in real estate, net		$ 127,167	$ 43,939	$ 143,790	$ 75,430
Discontinuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | Property	[1]	11	9	19	20
Square feet | ft²	[1]	5,174	3,990	9,461	8,626
Net proceeds	[1]	$ 676,387	$ 340,266	$ 1,446,200	$ 973,829
Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | Property		42	5	43	23
Square feet | ft²		5,778	1,772	6,254	4,077
Net proceeds		$ 572,430	$ 193,755	$ 595,772	$ 354,312

[1] The gains we recognize in Gains on Dispositions of Development Properties and Land, Net are primarily driven by the contribution of newly developed properties to our unconsolidated co-investment ventures and occasionally sales to a third party.