| Standard label: | Cash Collateral for Borrowed Securities |
| Name: | us-gaap:CashCollateralForBorrowedSecurities |
| Documentation: | Carrying amount as of the balance sheet date of cash collateral held for borrowed securities, for which the cash is restricted as to withdrawal or usage. |
| 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:CashCollateralForBorrowedSecurities |
| Label | Role | Language |
| Cash Collateral for Borrowed Securities | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 942 210 S99 1 (SX 210.9-03.1) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |
| FASB Accounting Standards Codification 944 210 S99 1 (SX 210.7-03.(a),2) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |