| Revenues from operations, excluding interest and dividend income. Includes revenues from the following sources: investment banking (underwriting and financial advisory), principal transactions (sales and trading, and investment gains and losses), commissions, asset management, and investment advisory and other services. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Revenues, Excluding Interest and Dividends | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Revenues, Excluding Interest and Dividends, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |