Business Segments - Segment Reporting, Reconciliation of Revenues, Operating Income and Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total revenues	$ 1,150,842	$ 1,266,124	$ 2,299,158	$ 2,244,365
Operating income	700,866	611,987	1,233,063	1,080,044
General and administrative expenses	74,342	64,664	152,374	134,353
Depreciation and amortization expenses	392,736	398,195	790,311	744,165
Gains on dispositions of development properties and land, net	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
Earnings from unconsolidated entities, net	72,419	54,142	139,468	142,872
Interest expense	(68,412)	(81,298)	(139,693)	(156,940)
Interest and other income, net	715	1,027	5,461	1,397
Foreign currency and derivative gains (losses), net	(6,080)	(60,836)	74,072	52,493
Losses on early extinguishment of debt, net	0	(23,573)	(187,453)	(66,340)
Earnings before income taxes	699,508	501,449	1,124,918	1,053,526
Total assets	56,441,385		56,441,385		$ 56,065,005
Investments in and advances to unconsolidated entities	7,811,448		7,811,448		7,602,014
Assets held for sale or contribution	692,072		692,072		1,070,724
Cash and cash equivalents	601,446	549,129	601,446	549,129	598,086	$ 1,088,855
Other assets	2,922,810		2,922,810		2,949,009
Real Estate Operations [Member]
Segment Reporting Information [Line Items]
Total assets	46,827,084		46,827,084		46,390,991
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	853,416	944,491	1,670,954	1,633,966
Total assets	46,865,306		46,865,306		46,429,882
Operating Segments [Member] | Real Estate Operations [Member]
Segment Reporting Information [Line Items]
Total revenues	1,021,455	945,466	2,049,810	1,827,116
Operating income	769,128	705,378	1,516,155	1,344,836
Operating Segments [Member] | Strategic Capital [Member]
Segment Reporting Information [Line Items]
Total revenues	129,387	320,658	249,348	417,249
Operating income	84,288	239,113	154,799	289,130
Total assets	38,222		38,222		38,891
Operating Segments [Member] | U.S. [Member] | Real Estate Operations [Member]
Segment Reporting Information [Line Items]
Total revenues	971,698	896,879	1,946,781	1,726,262
Operating income	734,295	675,126	1,443,598	1,277,730
Total assets	43,130,429		43,130,429		42,559,023
Operating Segments [Member] | U.S. [Member] | Strategic Capital [Member]
Segment Reporting Information [Line Items]
Total revenues	35,870	256,517	69,853	290,859
Operating income	15,352	203,582	23,654	217,206
Total assets	12,620		12,620		13,257
Operating Segments [Member] | Other Americas [Member] | Real Estate Operations [Member]
Segment Reporting Information [Line Items]
Total revenues	25,495	19,736	49,388	45,815
Operating income	19,229	13,817	36,824	33,273
Total assets	1,195,414		1,195,414		1,145,699
Operating Segments [Member] | Other Americas [Member] | Strategic Capital [Member]
Segment Reporting Information [Line Items]
Total revenues	19,475	9,596	30,138	18,707
Operating income	16,648	6,348	24,554	11,527
Operating Segments [Member] | Europe [Member] | Real Estate Operations [Member]
Segment Reporting Information [Line Items]
Total revenues	13,372	17,988	32,228	33,490
Operating income	7,474	8,655	20,665	18,810
Total assets	1,437,835		1,437,835		1,604,393
Operating Segments [Member] | Europe [Member] | Strategic Capital [Member]
Segment Reporting Information [Line Items]
Total revenues	47,835	31,532	91,264	64,122
Operating income	36,278	19,114	68,449	39,708
Total assets	25,280		25,280		25,280
Operating Segments [Member] | Asia [Member] | Real Estate Operations [Member]
Segment Reporting Information [Line Items]
Total revenues	10,890	10,863	21,413	21,549
Operating income	8,130	7,780	15,068	15,023
Total assets	1,063,406		1,063,406		1,081,876
Operating Segments [Member] | Asia [Member] | Strategic Capital [Member]
Segment Reporting Information [Line Items]
Total revenues	26,207	23,013	58,093	43,561
Operating income	16,010	10,069	38,142	20,689
Total assets	322		322		354
Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating income	700,866	611,987	1,233,063	1,080,044
General and administrative expenses	(74,342)	(64,664)	(152,374)	(134,353)
Depreciation and amortization expenses	(392,736)	(398,195)	(790,311)	(744,165)
Gains on dispositions of development properties and land, net	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
Earnings from unconsolidated entities, net	72,419	54,142	139,468	142,872
Interest expense	(68,412)	(81,298)	(139,693)	(156,940)
Interest and other income, net	715	1,027	5,461	1,397
Foreign currency and derivative gains (losses), net	(6,080)	(60,836)	74,072	52,493
Losses on early extinguishment of debt, net	0	$ (23,573)	(187,453)	$ (66,340)
Total assets	9,576,079		9,576,079		9,635,123
Investments in and advances to unconsolidated entities	7,811,448		7,811,448		7,602,014
Assets held for sale or contribution	692,072		692,072		1,070,724
Cash and cash equivalents	601,446		601,446		598,086
Other assets	$ 471,113		$ 471,113		$ 364,299