Investments in Unconsolidated Entities and International Investments - Combined Balance Sheets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
ASSETS:
Investment properties, at cost	$ 37,890,484	$ 37,932,366
Less - accumulated depreciation	15,982,792	15,621,127
Investment properties, at cost, net	21,907,692	22,311,239
Cash and cash equivalents	541,240	533,936
Tenant receivables and accrued revenue, net	828,876	919,654
Right-of-use assets, net	499,699	504,119
Deferred costs and other assets	1,185,705	1,121,011
Total assets	33,079,036	33,777,379
Liabilities and Partners' Deficit:
Mortgages	24,885,968	25,321,022
Accounts payable, accrued expenses, intangibles, and deferred revenues	1,337,984	1,433,216
Lease liabilities	502,440	506,931
Other liabilities	543,936	540,912
Total liabilities	28,982,034	29,376,654
Preferred units	566,080	547,740
Total liabilities and equity	33,079,036	33,777,379
Unconsolidated properties | Equity Method Investees excluding Klepierre and TRG and other platform investments
Our Share of:
Partners' deficit	(1,233,943)	(1,207,396)
Add: Excess Investment	1,247,214	1,283,645
Our net Investment in unconsolidated entities, at equity	13,271	76,249
Unconsolidated properties | Equity Method Investees excluding Klepierre and TRG and other platform investments
ASSETS:
Investment properties, at cost	19,334,244	19,724,242
Less - accumulated depreciation	8,411,236	8,330,891
Investment properties, at cost, net	10,923,008	11,393,351
Cash and cash equivalents	1,345,099	1,481,287
Tenant receivables and accrued revenue, net	501,324	591,369
Right-of-use assets, net	145,506	154,561
Deferred costs and other assets	387,420	394,691
Total assets	13,302,357	14,015,259
Liabilities and Partners' Deficit:
Mortgages	14,667,435	15,223,710
Accounts payable, accrued expenses, intangibles, and deferred revenues	810,849	995,392
Lease liabilities	133,720	158,372
Other liabilities	386,035	383,018
Total liabilities	15,998,039	16,760,492
Preferred units	67,450	67,450
Partners' deficit	(2,763,132)	(2,812,683)
Total liabilities and equity	$ 13,302,357	$ 14,015,259
Unconsolidated properties | Maximum
Our Share of:
Estimated life of investment property	40 years