Borrowings and Other Secured Financings (Rates for Long-Term Borrowings) (Details) |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|---|
| Borrowings and Other Secured Financings | |||
| Contractual weighted average coupon | 3.50% | 3.30% | 3.70% |
| Effective weighted average coupon after swaps | 3.60% | 2.50% | 2.50% |