Indebtedness - Narrative (Details) $ / shares in Units, $ in Thousands, € in Millions										12 Months Ended
	Nov. 17, 2023 USD ($)	Nov. 17, 2023 EUR (€)	Apr. 28, 2023 USD ($) property	Nov. 17, 2022 USD ($)	Nov. 17, 2022 EUR (€)	Nov. 16, 2022 USD ($)	Nov. 16, 2022 EUR (€)	Jan. 12, 2022 USD ($)	Jan. 11, 2022 USD ($)	Dec. 31, 2023 USD ($) item property	Dec. 31, 2021 USD ($)	Feb. 01, 2024 USD ($)	Nov. 14, 2023 USD ($) $ / shares	Nov. 14, 2023 EUR (€)	Nov. 09, 2023 USD ($)	Jun. 01, 2023 USD ($)	Mar. 13, 2023 USD ($)	Mar. 08, 2023 USD ($)	Jan. 10, 2023 EUR (€)	Dec. 31, 2022 USD ($)
Debt
Debt issuance costs										$ 140,442										$ 108,210
Other Debt Obligations										60,595										63,445
Long-term debt										26,033,423										24,960,286
Loss on debt extinguishment											$ 51,841
Fixed-Rate Debt:
Fixed rate debt										25,644,801										22,610,258
Net unamortized debt premium										13,635
Net discounts										86,626
Variable-Rate Debt:
Variable-rate mortgages and unsecured indebtedness										328,027										2,286,583
Simon Property Group, L.P.
Debt
Long-term debt										26,033,423										24,960,286
Loss on debt extinguishment											$ 51,841
Senior unsecured 3.50 percent bonds exchangeable into ordinary shares | Simon Property Group, L.P.
Debt
Debt issued													$ 808,000	€ 750.0
Interest rate on debt (as a percent)													3.50%	3.50%
Ordinary shares of common price | $ / shares													$ 27.2092
Secured Debt | Mortgages
Debt
Long-term debt										$ 5,200,000										5,500,000
Debt covenants
Number of non-recourse mortgage notes under which the Company and subsidiaries are borrowers | item										35
Number of properties pledged as collateral | property										38
Number of cross-defaulted and cross-collateralized mortgage pools | item										2
Total number of properties pledged as collateral for cross defaulted and cross collateralized mortgages | property										5
Secured Debt | Fixed Rate Mortgages
Debt
Debt issuance costs										$ 10,408										11,194
Fixed-Rate Debt:
Fixed rate debt										4,832,884										4,580,799
Net unamortized debt premium										$ 1,977										2,436
Weighted average maturity period, fixed-rate debt										3 years 1 month 6 days
Secured Debt | Fixed Rate Mortgages | Weighted average
Fixed-Rate Debt:
Fixed rate of interest										3.83%
Secured Debt | Variable Rate Mortgages
Debt
Debt issuance costs										$ 4,477										5,336
Variable-Rate Debt:
Variable-rate mortgages and unsecured indebtedness										$ 328,027										874,442
Weighted average maturity period, variable-rate debt										1 year 6 months
Secured Debt | Variable Rate Mortgages | Weighted average
Variable-Rate Debt:
Variable rate of interest										5.91%
Unsecured Debt | Simon Property Group, L.P.
Debt
Number of properties unencumbered from debt borrowing | property			2
Unsecured Debt | Senior unsecured notes
Debt
Debt issuance costs										$ 0										15,622
Variable-Rate Debt:
Variable-rate mortgages and unsecured indebtedness																				1,412,141
Unsecured Debt | Senior unsecured notes | Simon Property Group, L.P.
Debt
Long-term debt										20,700,000
Debt repaid				$ 777,100	€ 750.0
Unsecured Debt | Senior Unsecured Notes 2.75% due 2023 | Simon Property Group, L.P.
Debt
Amount of debt redeemed																$ 600,000
Interest rate on debt (as a percent)																2.75%
Unsecured Debt | Senior Unsecured Notes Maturing February 2032 | Simon Property Group, L.P.
Debt
Debt issued									$ 700,000
Interest rate on debt (as a percent)									2.65%
Unsecured Debt | Senior Unsecured Notes Maturing January 2024 | Simon Property Group, L.P.
Debt
Amount of debt redeemed																	$ 500,000
Debt issued									$ 500,000
Unsecured Debt | Senior Unsecured Notes Maturing January 2024 | Simon Property Group, L.P. | SOFR
Debt
Interest rate (as a percent)									0.43%
Unsecured Debt | Senior Unsecured Notes Maturing March 8, 2033 | Simon Property Group, L.P.
Debt
Debt issued																		$ 650,000
Interest rate on debt (as a percent)																		5.50%
Unsecured Debt | Senior Unsecured Notes Maturing March 8, 2053
Debt
Debt issued																		$ 650,000
Interest rate on debt (as a percent)																		5.85%
Unsecured Debt | Senior Unsecured Notes 6.65 Due January 15 2054 | Simon Property Group, L.P.
Debt
Debt issued															$ 500,000
Interest rate on debt (as a percent)															6.65%
Unsecured Debt | Senior Unsecured Notes 3.75 Due February 1 2024 [Member] | Simon Property Group, L.P.
Debt
Amount of debt redeemed												$ 600,000
Interest rate on debt (as a percent)												3.75%
Unsecured Debt | Senior Unsecured Notes 6.25 Due January 15 2034 | Simon Property Group, L.P.
Debt
Debt issued															$ 500,000
Interest rate on debt (as a percent)															6.25%
Unsecured Debt | Unsecured notes and Credit Facilities
Debt
Debt issuance costs										125,557										76,058
Fixed-Rate Debt:
Fixed rate debt										20,811,917										18,029,459
Net discounts										74,968										$ 32,421
Unsecured Debt | Commercial Paper | Simon Property Group, L.P.
Debt
Long-term debt										0
Maximum borrowing capacity										2,000,000
Unsecured Debt | Credit Facilities | Simon Property Group, L.P.
Debt
Available borrowing capacity										8,100,000
Maximum amount outstanding during period										1,100,000
Credit facility, weighted average amount outstanding										962,600
Letters of credit outstanding										58,600
Unsecured Debt | Credit Facility | Simon Property Group, L.P.
Debt
Credit facility, amount outstanding										305,000
Maximum borrowing capacity										5,000,000
Additional borrowing capacity										$ 1,000,000
Additional extension period | item										2
Debt extension period										6 months
Optional expanded maximum borrowing capacity										$ 6,000,000
Debt issued			$ 180,000
Unsecured Debt | Credit Facility | Simon Property Group, L.P. | Fed Funds Effective Rate
Debt
Interest rate (as a percent)										0.50%
Unsecured Debt | Credit Facility | Simon Property Group, L.P. | Adjusted Term One-Month SOFR
Debt
Interest rate (as a percent)										1.00%
Unsecured Debt | Credit Facility | Simon Property Group, L.P. | SOFR
Debt
Interest rate (as a percent)										0.725%
Unsecured Debt | Credit Facility | Minimum | Simon Property Group, L.P.
Debt
Facility fee (in percentage)										0.10%
Unsecured Debt | Credit Facility | Minimum | Simon Property Group, L.P. | Base Rate
Debt
Interest rate (as a percent)										0.00%
Unsecured Debt | Credit Facility | Minimum | Simon Property Group, L.P. | SOFR
Debt
Interest rate (as a percent)										0.65%
Unsecured Debt | Credit Facility | Maximum | Simon Property Group, L.P.
Debt
Percentage of borrowings in currencies other than the U.S. dollar										97.00%
Facility fee (in percentage)										0.30%
Unsecured Debt | Credit Facility | Maximum | Simon Property Group, L.P. | Base Rate
Debt
Interest rate (as a percent)										0.40%
Unsecured Debt | Credit Facility | Maximum | Simon Property Group, L.P. | SOFR
Debt
Interest rate (as a percent)										1.40%
Unsecured Debt | Supplemental Facility | Simon Property Group, L.P.
Debt
Amount drawn						$ 779,000	€ 750.0
Maximum borrowing capacity										$ 3,500,000
Credit facility, amount repaid	$ 815,400	€ 750.0						$ 1,050,000
Optional expanded maximum borrowing capacity										$ 4,500,000
Unsecured Debt | Supplemental Facility | Simon Property Group, L.P. | Interest rate swap
Debt
Notional Amount | €																			€ 750.0
Fixed exchange rate																			3.81%
Unsecured Debt | Supplemental Facility | Simon Property Group, L.P. | Fed Funds Effective Rate
Debt
Interest rate (as a percent)										0.50%
Unsecured Debt | Supplemental Facility | Simon Property Group, L.P. | Adjusted Term One-Month SOFR
Debt
Interest rate (as a percent)										1.00%
Unsecured Debt | Supplemental Facility | Simon Property Group, L.P. | SOFR
Debt
Interest rate (as a percent)										0.725%
Unsecured Debt | Supplemental Facility | Minimum | Simon Property Group, L.P.
Debt
Facility fee (in percentage)										0.10%
Unsecured Debt | Supplemental Facility | Minimum | Simon Property Group, L.P. | Base Rate
Debt
Interest rate (as a percent)										0.00%
Unsecured Debt | Supplemental Facility | Minimum | Simon Property Group, L.P. | SOFR
Debt
Interest rate (as a percent)										0.65%
Unsecured Debt | Supplemental Facility | Maximum | Simon Property Group, L.P.
Debt
Percentage of borrowings in currencies other than the U.S. dollar										100.00%
Facility fee (in percentage)										0.30%
Unsecured Debt | Supplemental Facility | Maximum | Simon Property Group, L.P. | Base Rate
Debt
Interest rate (as a percent)										0.40%
Unsecured Debt | Supplemental Facility | Maximum | Simon Property Group, L.P. | SOFR
Debt
Interest rate (as a percent)										1.40%