Collateralized Transactions (Restricted Cash and Segregated Securities) (Details) - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|---|
| Collateralized Transactions | |||
| Restricted cash | $ 35,356 | $ 34,231 | $ 33,979 |
| Segregated securities | 26,877 | 20,549 | |
| Total | $ 62,233 | $ 54,780 |
| X | ||||||||||
- Definition Amount of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Securities deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations. No definition available.
|