Investments in Unconsolidated Entities and International Investments - Combined Balance Sheets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
ASSETS:
Investment properties, at cost	$ 37,982,665	$ 37,932,366
Less - accumulated depreciation	16,245,409	15,621,127
Investment properties, at cost, net	21,737,256	22,311,239
Cash and cash equivalents	601,520	533,936
Tenant receivables and accrued revenue, net	794,599	919,654
Right-of-use assets, net	497,490	504,119
Deferred costs and other assets	1,174,857	1,121,011
Total assets	32,795,363	33,777,379
Liabilities and Partners' Deficit:
Mortgages	24,640,370	25,321,022
Accounts payable, accrued expenses, intangibles, and deferred revenues	1,421,443	1,433,216
Lease liabilities	500,197	506,931
Other liabilities	495,142	540,912
Total liabilities	28,758,802	29,376,654
Preferred units	559,482	547,740
Total liabilities and equity	32,795,363	33,777,379
Unconsolidated properties | Equity Method Investees excluding Klepierre and TRG and other platform investments
Our Share of:
Partners' deficit	(1,238,149)	(1,207,396)
Add: Excess Investment	1,228,164	1,283,645
Our net (deficit) Investment in unconsolidated entities, at equity	(9,985)	76,249
Unconsolidated properties | Equity Method Investees excluding Klepierre and TRG and other platform investments
ASSETS:
Investment properties, at cost	18,889,882	19,724,242
Less - accumulated depreciation	8,315,951	8,330,891
Investment properties, at cost, net	10,573,931	11,393,351
Cash and cash equivalents	1,375,947	1,481,287
Tenant receivables and accrued revenue, net	493,643	591,369
Right-of-use assets, net	132,665	154,561
Deferred costs and other assets	451,414	394,691
Total assets	13,027,600	14,015,259
Liabilities and Partners' Deficit:
Mortgages	14,455,676	15,223,710
Accounts payable, accrued expenses, intangibles, and deferred revenues	870,351	995,392
Lease liabilities	121,668	158,372
Other liabilities	363,615	383,018
Total liabilities	15,811,310	16,760,492
Preferred units	67,450	67,450
Partners' deficit	(2,851,160)	(2,812,683)
Total liabilities and equity	$ 13,027,600	$ 14,015,259
Unconsolidated properties | Maximum
Our Share of:
Estimated life of investment property	40 years