| Standard label: | Accrued Exchange Fee Rebate |
| Name: | us-gaap:AccruedExchangeFeeRebateCurrentAndNoncurrent |
| Documentation: | Carrying value as of the balance sheet date of obligations incurred through that date and payable for rebates of an exchange fee some mutual funds impose on shareholders if they exchange (transfer) to another fund within the same fund group. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AccruedExchangeFeeRebateCurrentAndNoncurrent |
| Label | Role | Language |
| Accrued Exchange Fee Rebate | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 942 210 S99 1 (SX 210.9-03.15(5)) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |
| FASB Accounting Standards Codification 944 210 S99 1 (SX 210.7-03.15(a)) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |