Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ASSETS:
Investment properties, at cost	$ 38,050,196	$ 37,804,495
Less - accumulated depreciation	14,891,937	13,905,776
Investment properties, at cost, net	23,158,259	23,898,719
Cash and cash equivalents	1,011,613	669,373
Tenant receivables and accrued revenue, net	1,236,734	832,151
Right-of-use assets, net	512,914	514,660
Deferred costs and other assets	1,082,168	1,214,025
Total assets	34,786,846	31,231,630
LIABILITIES:
Mortgages and unsecured indebtedness	26,723,361	24,163,230
Accounts payable, accrued expenses, intangibles, and deferred revenues	1,311,925	1,390,682
Cash distributions and losses in unconsolidated entities, at equity	1,577,393	1,566,294
Dividend/Distribution payable	486,922
Lease liabilities	515,492	516,809
Other liabilities	513,515	464,304
Total liabilities	31,128,608	28,101,319
Commitments and contingencies
Limited partners' preferred interest in the Operating Partnership and noncontrolling redeemable interests in properties	185,892	219,061
Capital stock (850,000,000 total shares authorized, $0.0001 par value, 238,000,000 shares of excess common stock, 100,000,000 authorized shares of preferred stock):
Series J 83/8% cumulative redeemable preferred stock, 1,000,000 shares authorized, 796,948 issued and outstanding with a liquidation value of $39,847	42,091	42,420
Capital in excess of par value	11,179,688	9,756,073
Accumulated deficit	(6,102,314)	(5,379,952)
Accumulated other comprehensive loss	(188,675)	(118,604)
Common stock held in treasury, at cost, 14,355,621 and 13,574,296 shares, respectively	(1,891,352)	(1,773,571)
Total stockholders' equity	3,039,472	2,526,398
Noncontrolling interests	432,874	384,852
Total equity	3,472,346	2,911,250
Total liabilities and equity	34,786,846	31,231,630
Unconsolidated Investments excluding Klepierre and TRG
ASSETS:
Investment, in equity	2,603,571	2,371,053
Klepierre
ASSETS:
Investment, in equity	1,729,690	1,731,649
TRG
ASSETS:
Investment, in equity	3,451,897
Simon Property Group, L.P.
ASSETS:
Investment properties, at cost	38,050,196	37,804,495
Less - accumulated depreciation	14,891,937	13,905,776
Investment properties, at cost, net	23,158,259	23,898,719
Cash and cash equivalents	1,011,613	669,373
Tenant receivables and accrued revenue, net	1,236,734	832,151
Right-of-use assets, net	512,914	514,660
Deferred costs and other assets	1,082,168	1,214,025
Total assets	34,786,846	31,231,630
LIABILITIES:
Mortgages and unsecured indebtedness	26,723,361	24,163,230
Accounts payable, accrued expenses, intangibles, and deferred revenues	1,311,925	1,390,682
Cash distributions and losses in unconsolidated entities, at equity	1,577,393	1,566,294
Dividend/Distribution payable	486,922
Lease liabilities	515,492	516,809
Other liabilities	513,515	464,304
Total liabilities	31,128,608	28,101,319
Commitments and contingencies
Limited partners' preferred interest in the Operating Partnership and noncontrolling redeemable interests in properties	185,892	219,061
Capital stock (850,000,000 total shares authorized, $0.0001 par value, 238,000,000 shares of excess common stock, 100,000,000 authorized shares of preferred stock):
Preferred units, 796,948 units outstanding. Liquidation value of $39,847	42,091	42,420
General Partner, 328,501,416 and 306,868,960 units outstanding, respectively	2,997,381	2,483,978
Limited Partners, 47,322,212 and 46,740,117 units outstanding, respectively	431,784	378,339
Total partners' equity	3,471,256	2,904,737
Nonredeemable noncontrolling interests in properties, net	1,090	6,513
Total equity	3,472,346	2,911,250
Total liabilities and equity	34,786,846	31,231,630
Simon Property Group, L.P. | Unconsolidated Investments excluding Klepierre and TRG
ASSETS:
Investment, in equity	2,603,571	2,371,053
Simon Property Group, L.P. | Klepierre
ASSETS:
Investment, in equity	1,729,690	1,731,649
Simon Property Group, L.P. | TRG
ASSETS:
Investment, in equity	3,451,897
Common stock
Capital stock (850,000,000 total shares authorized, $0.0001 par value, 238,000,000 shares of excess common stock, 100,000,000 authorized shares of preferred stock):
Common stock	34	32
Class B common stock
Capital stock (850,000,000 total shares authorized, $0.0001 par value, 238,000,000 shares of excess common stock, 100,000,000 authorized shares of preferred stock):
Common stock