Summary of Significant Accounting Policies (Policies) - SIMON PROPERTY GROUP AND ADOPTING ENTITIES MATCHING SAVINGS PLAN |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Summary of Significant Accounting Policies | |
| Basis of Accounting | Basis of Accounting The accompanying financial statements have been prepared on the accrual basis of accounting. |
| Payment of Benefits | Payment of Benefits Benefits are recorded when paid. |
| Contributions | Contributions Contributions from Plan participants and the matching contributions from the Employer are recorded in the year in which the employee contributions are withheld from compensation. |
| Use of Estimates | Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles in the United States (U.S. GAAP) requires management to make estimates that affect the amounts reported in the financial statements and accompanying notes and supplemental schedule. Actual results could differ from those estimates. |
| Investment Valuation and Income Recognition | Investment Valuation and Income Recognition Investments held by the Plan are stated at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). See Note 7 for further discussion of fair value measurements. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded as earned. Dividends are recorded on the ex-dividend date. Net appreciation (depreciation) includes the Plan’s gains and losses on investments bought and sold, as well as held, during the year. |