Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated Net Income	$ 2,822,343	$ 2,244,903	$ 2,134,706
Adjustments to reconcile consolidated net income to net cash provided by operating activities -
Depreciation and amortization	1,349,776	1,357,351	1,327,946
Loss on debt extinguishment		128,618	136,777
Gain upon acquisition of controlling interests, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net	(288,827)	(3,647)	(84,553)
Pre-development project cost charge			31,490
Gains on sales of marketable securities		(21,541)
Unrealized change in fair value of equity instruments	15,212
Gain on interest in unconsolidated entity (Note 7)	(35,621)
Straight-line rent	(18,325)	(26,543)	(46,656)
Equity in income of unconsolidated entities	(475,250)	(400,270)	(353,334)
Distributions of income from unconsolidated entities	390,137	374,101	331,627
Changes in assets and liabilities -
Tenant receivables and accrued revenue, net	(17,518)	(26,170)	16,277
Deferred costs and other assets	(75,438)	(132,945)	(43,797)
Accounts payable, accrued expenses, intangibles, deferred revenues and other liabilities	84,307	99,931	(77,789)
Net cash provided by operating activities	3,750,796	3,593,788	3,372,694
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions	(51,060)	(264,488)	(499,976)
Funding of loans to related parties	(4,641)	(71,532)
Repayments of loans to related parties			8,207
Capital expenditures, net	(781,909)	(732,100)	(798,465)
Cash impact from the consolidation of properties	11,276	7,536	59,994
Net proceeds from sale of assets	183,241	19,944	36,558
Investments in unconsolidated entities	(63,397)	(157,173)	(312,160)
Purchase of marketable and non-marketable securities	(21,563)	(25,000)	(38,809)
Proceeds from sales of marketable and non-marketable securities	25,000	56,268	42,600
Insurance proceeds for property restoration	19,083
Distributions of capital from unconsolidated entities and other	447,464	405,078	533,025
Net cash used in investing activities	(236,506)	(761,467)	(969,026)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from sales of common stock, issuance of units and other, net of transaction costs	(329)	(328)	(328)
Purchase of shares or units related to stock grant recipients' tax withholdings	(2,911)	(2,789)	(4,299)
Redemption of limited partner units	(81,506)
Purchase of treasury stock	(354,108)	(407,002)	(255,267)
Distributions to noncontrolling interest holders in properties	(76,963)	(11,295)	(9,731)
Contributions from noncontrolling interest holders in properties	161	382	1,507
Preferred distributions of the Operating Partnership	(1,915)	(1,915)	(1,915)
Distributions to stockholders and preferred dividends	(2,449,071)	(2,231,259)	(2,037,542)
Distributions to limited partners	(370,656)	(338,602)	(316,428)
Loss on debt extinguishment		(128,618)	(136,777)
Proceeds from issuance of debt, net of transaction costs	7,973,719	11,668,026	14,866,205
Repayments of debt	(9,118,685)	(10,456,671)	(14,650,168)
Net cash used in financing activities	(4,482,264)	(1,910,071)	(2,544,743)
(DECREASE)/INCREASE IN CASH AND CASH EQUIVALENTS	(967,974)	922,250	(141,075)
CASH AND CASH EQUIVALENTS, beginning of period	1,482,309	560,059	701,134
CASH AND CASH EQUIVALENTS, end of period	514,335	1,482,309	560,059
Simon Property Group, L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated Net Income	2,822,343	2,244,903	2,134,706
Adjustments to reconcile consolidated net income to net cash provided by operating activities -
Depreciation and amortization	1,349,776	1,357,351	1,327,946
Loss on debt extinguishment		128,618	136,777
Gain upon acquisition of controlling interests, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net	(288,827)	(3,647)	(84,553)
Pre-development project cost charge			31,490
Gains on sales of marketable securities		(21,541)
Unrealized change in fair value of equity instruments	15,212
Gain on interest in unconsolidated entity (Note 7)	(35,621)
Straight-line rent	(18,325)	(26,543)	(46,656)
Equity in income of unconsolidated entities	(475,250)	(400,270)	(353,334)
Distributions of income from unconsolidated entities	390,137	374,101	331,627
Changes in assets and liabilities -
Tenant receivables and accrued revenue, net	(17,518)	(26,170)	16,277
Deferred costs and other assets	(75,438)	(132,945)	(43,797)
Accounts payable, accrued expenses, intangibles, deferred revenues and other liabilities	84,307	99,931	(77,789)
Net cash provided by operating activities	3,750,796	3,593,788	3,372,694
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions	(51,060)	(264,488)	(499,976)
Funding of loans to related parties	(4,641)	(71,532)
Repayments of loans to related parties			8,207
Capital expenditures, net	(781,909)	(732,100)	(798,465)
Cash impact from the consolidation of properties	11,276	7,536	59,994
Net proceeds from sale of assets	183,241	19,944	36,558
Investments in unconsolidated entities	(63,397)	(157,173)	(312,160)
Purchase of marketable and non-marketable securities	(21,563)	(25,000)	(38,809)
Proceeds from sales of marketable and non-marketable securities	25,000	56,268	42,600
Insurance proceeds for property restoration	19,083
Distributions of capital from unconsolidated entities and other	447,464	405,078	533,025
Net cash used in investing activities	(236,506)	(761,467)	(969,026)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from sales of common stock, issuance of units and other, net of transaction costs	(329)	(328)	(328)
Purchase of shares or units related to stock grant recipients' tax withholdings	(2,911)	(2,789)	(4,299)
Redemption of limited partner units	(81,506)
Purchase of general partner units	(354,108)	(407,002)	(255,267)
Distributions to noncontrolling interest holders in properties	(76,963)	(11,295)	(9,731)
Contributions from noncontrolling interest holders in properties	161	382	1,507
Preferred distributions of the Operating Partnership	(2,821,642)	(2,571,776)	(2,355,885)
Loss on debt extinguishment		(128,618)	(136,777)
Proceeds from issuance of debt, net of transaction costs	7,973,719	11,668,026	14,866,205
Repayments of debt	(9,118,685)	(10,456,671)	(14,650,168)
Net cash used in financing activities	(4,482,264)	(1,910,071)	(2,544,743)
(DECREASE)/INCREASE IN CASH AND CASH EQUIVALENTS	(967,974)	922,250	(141,075)
CASH AND CASH EQUIVALENTS, beginning of period	1,482,309	560,059	701,134
CASH AND CASH EQUIVALENTS, end of period	$ 514,335	$ 1,482,309	$ 560,059