Real Estate - Summary of Dispositions of Net Investments in Real Estate (Detail) ft² in Thousands, $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2021 USD ($) ft² Property	[2]	Sep. 30, 2020 USD ($) ft² Property	Sep. 30, 2021 USD ($) ft² Property	[2]	Sep. 30, 2020 USD ($) 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]	$ 139,406		$ 134,207	$ 500,410		$ 383,373
Gains on other dispositions of investments in real estate, net		$ 214,390		$ 108,927	$ 358,180		$ 184,357
Discontinuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | Property	[1]	12		12	31		32
Square feet | ft²	[1]	2,876		3,150	12,337		11,776
Net proceeds	[1]	$ 368,131		$ 410,398	$ 1,814,331		$ 1,384,227
Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | Property		31		15	74		38
Square feet | ft²		5,806		2,558	12,060		6,635
Net proceeds		$ 738,396		$ 409,303	$ 1,334,168		$ 763,615

[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.

[2] During the three and nine months ended September 30, 2021, we sold our ownership interest in an unconsolidated other venture.