S000012717 [Member] Shareholder Fees - GLOBAL REAL ESTATE INDEX FUND - GLOBAL REAL ESTATE INDEX FUND |
Mar. 31, 2026 |
|---|---|
| Prospectus [Line Items] | |
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | 0.00% |
| Redemption Fee (as a percentage of Amount Redeemed) | (2.00%) |