| Standard label: | Securities Purchased under Agreements to Resell |
| Name: | us-gaap:SecuritiesPurchasedUnderAgreementsToResell |
| Documentation: | Amount, after the effects of master netting arrangements, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes purchases of participations in pools of securities that are subject to a resale agreement, assets not subject to a master netting arrangement and not elected to be offset. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:SecuritiesPurchasedUnderAgreementsToResell |
| Label | Role | Language |
| Securities Purchased under Agreements to Resell | http://www.xbrl.org/2003/role/label | en-US |
| Securities Purchased under Agreements to Resell, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 20 50 3 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 210 20 55 10 | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 210 20 45 11 | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 235 10 S99 1 (SX 210.4-08(m)(2)(i)) | http://fasb.org/us-gaap/role/ref/legacyRef | 235 |
| FASB Accounting Standards Codification 942 210 S99 1 (SX 210.9-03(3)) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |