Document and Entity Information Document Information [Table] Legal Entity [Axis] Entity [Domain] Represents the Retirement Plan Number 002. E B P 002 [Member] SIMON PROPERTY GROUP AND ADOPTING ENTITIES MATCHING SAVINGS PLAN Document Information [Line Items] Document and Entity Information Document Type Document Period End Date Entity Registrant Name Entity Central Index Key Amendment Flag Statements of Net Assets Available for Benefits EBP, Statement of Net Asset Available for Benefit [Table] Investment Type [Axis] Investments [Domain] Common Collective Trust [Member] Common/collective trust funds EBP, Employer, Common Stock [Member] Common stock Common Stock EBP, Statement of Net Asset Available for Benefit [Line Items] Statements of Net Assets Available for Benefits EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Investments at fair value Total assets at fair value EBP, Receivable [Abstract] Receivables: EBP, Note Receivable from Participant Notes receivable from participants EBP, Net Asset Available for Benefit End of year Beginning of year Total assets available for benefits Statement of Changes in Net Assets Available for Benefits EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Statement of Changes in Net Assets Available for Benefits EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Additions EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Participant EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Rollover EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Employer EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan Transfer-in of plan assets EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment Interest and dividends EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Unrealized Gain (Loss) on Investment Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase Total additions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Deductions EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefits paid EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease Total deductions EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Net increase EBP, Change in Net Asset Available for Benefit, Increase (Decrease) [Abstract] Net assets available for benefits: Description of the Plan EBP, Description of Plan [Table] EBP, Description of Plan [Line Items] Description of the Plan EBP, Description of Plan [Text Block] Description of the Plan Summary of Significant Accounting Policies EBP, Accounting Policy [Table] EBP, Accounting Policy [Line Items] Summary of Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] Summary of Significant Accounting Policies Tax Status EBP, Tax Status [Table] EBP, Tax Status [Line Items] Tax Status EBP, Tax Status [Text Block] Tax Status Risks and Uncertainties EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Line Items] Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Risks and Uncertainties Related-Party and Party in Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Line Items] Related-Party and Party in Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] Related-Party and Party in Interest Transactions Reconciliation of Financial Statements to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] Reconciliation of Financial Statements to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Reconciliation of Financial Statements to Form 5500 Fair Value Measurements EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Line Items] Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Fair Value Measurements Subsequent Event EBP, Subsequent Event [Table] EBP, Subsequent Event [Line Items] Subsequent Event EBP, Subsequent Event [Text Block] Subsequent Event Schedule H, Line 4i - Schedule of Assets (Held at End of Year) EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Line Items] Schedule H, Line 4i - Schedule of Assets (Held at End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Schedule H, Line 4i - Schedule of Assets (Held at End of Year) EBP, Basis of Accounting [Policy Text Block] Basis of Accounting EBP, Payment to Participant [Policy Text Block] Payment of Benefits EBP, Contribution [Policy Text Block] Contributions EBP, Use of Estimate [Policy Text Block] Use of Estimates EBP, Investment [Policy Text Block] Investment Valuation and Income Recognition Tabular disclosure of discretionary profit-sharing contributions vesting schedule. Employee Benefit Plan, Discretionary Profit-Sharing Contributions Vesting Schedule [Table Text Block] Summary of vesting schedule for discretionary profitsharing contributions EBP, Investment, Fair Value and NAV [Table Text Block] Schedule of fair value hierarchy of plan's assets Scenario [Axis] Scenario [Domain] Represents the first portion of salary deductions. First Portion of Salary Deductions [Member] First portion of salary deductions Represents the second portion of salary deductions. Second Portion of Salary Deductions [Member] Second portion of salary deductions Represents the percentage of controlling ownership in entity. Percentage of Controlling Ownership in Entity Percentage of ownership in entity Represents the minimum service period for plan eligibility under (employee benefit plan (EBP)). Employee Benefit Plan, Minimum Service Period For Plan Eligibility Minimum service period for Plan eligibility Represents the minimum age criteria for plan eligibility under (employee benefit plan (EBP)). Employee Benefit Plan, Minimum Age For Plan Eligibility Minimum age for Plan eligibility Percentage of minimum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation. Employee Benefit Plan, Participant Contribution, Pretax, Minimum Annual Compensation to Total Compensation Percentage Minimum amount of compensation eligible for participant contribution (as a percent) EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Maximum amount of compensation eligible for participant contribution (as a percent) EBP, Participant Contribution, Automatic, Deferral Rate Participant's deferral rate (as a percent) Percentage of automatic increase per year in pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), contributes to total pretax annual compensation. Employee Benefit Plan, Participant Contribution, Automatic Increase Per Year, Percent Employee contribution automatic increase per year (as a percent) Threshold percent of contribution for increase in pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), contributes to total pretax annual compensation. Employee Benefit Plan, Maximum Contribution for Automatic Increase, Threshold Percent Employee contribution automatic increase, threshold (as a percent) Represents the minimum service period for receiving the employer contribution under (employee benefit plan (EBP)). Employee Benefit Plan, Employer Contribution, Minimum Service Period For Plan Eligibility Minimum service period for receiving employer contribution Represents the minimum service period expressed in hours, for profit sharing eligibility under (employee benefit plan (EBP)). Employee Benefit Plan, Service Period for Profit Sharing Eligibility, Minimum Hours Service period for profit sharing eligibility (in hours) EBP, Employer Contribution, Matching Percentage Employer matching contribution (as a percent) EBP, Employer Contribution, Participant Compensation Matched, Percentage Participant compensation matched (as a percent) Amount of discretionary contributions made by an employer to a defined contribution plan. Employee Benefit Plan, Employer Discretionary Contribution Amount Discretionary profit-sharing contributions, net of forfeitures EBP, Forfeited Nonvested Account Unallocated participant forfeitures EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Forfeitures used to reduce employer contributions Information by years of vesting service in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Years of Vesting Service [Axis] Employee Benefit Plan, Years of Vesting Service [Axis] Years of vesting service in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Years of Vesting Service [Domain] Employee Benefit Plan, Years of Vesting Service [Domain] Tranche two of years of vesting service in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Years of Vesting Service, Tranche Two [Member] 2 Tranche three of years of vesting service in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Years of Vesting Service, Tranche Three [Member] 3 Tranche four of years of vesting service in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Years of Vesting Service, Tranche Four [Member] 4 Tranche five of years of vesting service in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Years of Vesting Service, Tranche Five [Member] 5 Tranche six of years of vesting service in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Years of Vesting Service, Tranche Six [Member] 6 or more Represents the percentage of vesting. Employee Benefit Plan, Vesting Percentage Vesting percentage Represents the minimum vested balance for lump sum or installment payments in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employer Benefit Plan, Minimum Vested Balance For Lump Sum Payment Or Installment Payments Minimum vested balance to receive lump sum or installment payments Represents the maximum vested balance for single lump sum payment in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employer Benefit Plan, Maximum Vested Balance For Single Lump Sum Payment Maximum vested balance for single lump sum payment Represents the percentage of vesting of participant accounts in the event of termination. Employee Benefit Plan, Vesting Percentage in Event of Termination Vesting percentage EBP, Tax Determination Letter, Obtained [true false] Determination letter obtained EBP, Tax Determination Letter, Date Determination letter date EBP, Tax Qualification Status [Extensible Enumeration] Tax qualification status EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Common stock dividends EBP, Form 5500 Caption, Net Assets Net assets available for benefits per the Form 5500 EBP, Form 5500 Caption, Benefit Payment and Payments to Provide Benefits Benefits paid to participants per the Form 5500 Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Level 1 Business Combination [Axis] Business Combination [Domain] Represents information pertaining to The Taubman Realty Group, LLC. The Taubman Realty Group, LLC [Member] TRG Percentage of voting interest acquired in an entity. Percentage Of Voting Interest Acquired Percentage of voting interest acquired Statistical Measurement [Axis] Statistical Measurement [Domain] Maximum [Member] Maximum Minimum [Member] Minimum Investment, Identifier [Axis] Entity Tax Identification Number Entity tax identification number EBP, Plan Number Plan number EBP, Investment, Issuer Name [Extensible Enumeration] Investment issuer name EBP, Investment, Current Value, Type [Extensible Enumeration] Investment type EBP, Investment, Number of Shares Number of shares EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Current Value EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Participant loans EBP, Asset Held for Investment Total EBP, Asset Held for Investment, Participant Loan, Interest Rate Participant loans, interest rate EBP, Asset Held for Investment, Party-in-Interest [true false] Investment party in interest EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Investment participation status