Cover
| Cover | Apr. 07, 2020 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 7, 2020 |
| Entity File Number | 001-14469 |
| Entity Registrant Name | SIMON PROPERTY GROUP, INC. |
| Entity Central Index Key | 0001063761 |
| Entity Tax Identification Number | 04-6268599 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 225 West Washington Street |
| Entity Address, City or Town | Indianapolis |
| Entity Address, State or Province | IN |
| Entity Address, Postal Zip Code | 46204 |
| City Area Code | 317 |
| Local Phone Number | 636-1600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common stock, $0.0001 par value |
| Trading Symbol | SPG |
| Security Exchange Name | NYSE |
| Series J Preferred stock | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 8⅜% Series J Cumulative Redeemable Preferred Stock, $0.0001 par value |
| Trading Symbol | SPGJ |
| Security Exchange Name | NYSE |
| Simon Property Group, L.P. | |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 7, 2020 |
| Entity File Number | 001-36110 |
| Entity Registrant Name | SIMON PROPERTY GROUP, L.P. |
| Entity Central Index Key | 0001022344 |
| Entity Tax Identification Number | 34-1755769 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 225 West Washington Street |
| Entity Address, City or Town | Indianapolis |
| Entity Address, State or Province | IN |
| Entity Address, Postal Zip Code | 46204 |
| City Area Code | 317 |
| Local Phone Number | 636-1600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Simon Property Group, L.P. | Senior Unsecured2.375 Percent Member | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 2.375% Senior Unsecured Notes due 2020 |
| Trading Symbol | SPG/20 |
| Security Exchange Name | NYSE |