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Financial Assets And Financial Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Financial Assets And Financial Liabilities [Abstract] |
Fair Value Table |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Financial Assets At Fair Value as of December 31, 2017
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Securities segregated for regulatory purposes |  | $ | 4,519 |  | $ | — |  | $ | — |  | $ | 4,519
﻿Financial instruments owned, at fair value |  |  |  |  |  |  |  |  |  |  |  |
﻿Stocks |  |  | 2,000 |  |  | — |  |  | 1 |  |  | 2,001
﻿Options |  |  | 1,052 |  |  | — |  |  | — |  |  | 1,052
﻿Warrants and discount certificates |  |  | 5 |  |  | — |  |  | — |  |  | 5
﻿U.S. and foreign government securities |  |  | 60 |  |  | — |  |  | — |  |  | 60
﻿Corporate and municipal bonds |  |  | — |  |  | 1 |  |  | 3 |  |  | 4
﻿Currency forward contracts |  |  | — |  |  | 32 |  |  | — |  |  | 32
﻿Total financial instruments owned, at fair value |  |  | 3,117 |  |  | 33 |  |  | 4 |  |  | 3,154
﻿Total financial assets at fair value |  | $ | 7,636 |  | $ | 33 |  | $ | 4 |  | $ | 7,673
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Financial Liabilities At Fair Value as of December 31, 2017
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Financial instruments sold, but not yet purchased, at fair value |  |  |  |  |  |  |  |  |  |  |  |
﻿Stocks |  | $ | 302 |  | $ | — |  | $ | — |  | $ | 302
﻿Options |  |  | 464 |  |  | — |  |  | — |  |  | 464
﻿Currency forward contracts |  |  | — |  |  | 1 |  |  | — |  |  | 1
﻿Total financial instruments sold, but not yet purchased, at fair value |  |  | 766 |  |  | 1 |  |  | — |  |  | 767
﻿Total financial liabilities at fair value |  | $ | 766 |  | $ | 1 |  | $ | — |  | $ | 767
﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Financial Assets At Fair Value as of December 31, 2016
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Securities segregated for regulatory purposes |  | $ | 7,398 |  | $ | — |  | $ | — |  | $ | 7,398
﻿Financial instruments owned, at fair value |  |  |  |  |  |  |  |  |  |  |  |
﻿Stocks |  |  | 1,821 |  |  | — |  |  | — |  |  | 1,821
﻿Options |  |  | 1,804 |  |  | — |  |  | — |  |  | 1,804
﻿Warrants and discount certificates |  |  | 43 |  |  | — |  |  | — |  |  | 43
﻿U.S. and foreign government securities |  |  | 363 |  |  | — |  |  | — |  |  | 363
﻿Corporate and municipal bonds |  |  | — |  |  | 2 |  |  | 1 |  |  | 3
﻿Currency forward contracts |  |  | — |  |  | 3 |  |  | — |  |  | 3
﻿Total financial instruments owned, at fair value |  |  | 4,031 |  |  | 5 |  |  | 1 |  |  | 4,037
﻿Total financial assets at fair value |  | $ | 11,429 |  | $ | 5 |  | $ | 1 |  | $ | 11,435
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Financial Liabilities At Fair Value as of December 31, 2016
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Financial instruments sold, but not yet purchased, at fair value |  |  |  |  |  |  |  |  |  |  |  |
﻿Stocks |  | $ | 839 |  | $ | — |  | $ | — |  | $ | 839
﻿Options |  |  | 1,286 |  |  | — |  |  | — |  |  | 1,286
﻿Warrants and discount certificates |  |  | 1 |  |  | — |  |  | — |  |  | 1
﻿Currency forward contracts |  |  | — |  |  | 19 |  |  | — |  |  | 19
﻿Total financial instruments sold, but not yet purchased, at fair value |  |  | 2,126 |  |  | 19 |  |  | — |  |  | 2,145
﻿Total financial liabilities at fair value |  | $ | 2,126 |  | $ | 19 |  | $ | — |  | $ | 2,145
﻿
Trading Gains From Market Making Transactions |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Year-Ended December 31,
﻿ |  | 2017 |  | 2016 |  | 2015
﻿ |  | (in millions)
﻿Equities |  | $ | 42 |  | $ | 155 |  | $ | 254
﻿Fixed income |  |  | — |  |  | — |  |  | 1
﻿Foreign exchange |  |  | (2) |  |  | 8 |  |  | 14
﻿Total trading gains, net |  | $ | 40 |  | $ | 163 |  | $ | 269
﻿
Financial Assets and Liabilities Not Measured at Fair Value | ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | December 31, 2017
﻿ |  | Carrying Value |  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Financial assets, not measured at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cash and cash equivalents |  | $ | 1,732 |  | $ | 1,732 |  | $ | 1,732 |  | $ | - |  | $ | -
﻿Cash and securities segregated for regulatory purposes |  |  | 15,713 |  |  | 15,713 |  |  | 6,547 |  |  | 9,166 |  |  | -
﻿Securities borrowed |  |  | 2,957 |  |  | 2,957 |  |  | - |  |  | 2,957 |  |  | -
﻿Securities purchased under agreements to resell |  |  | 2,035 |  |  | 2,035 |  |  | - |  |  | 2,035 |  |  | -
﻿Receivables from customer |  |  | 29,821 |  |  | 29,821 |  |  | - |  |  | 29,821 |  |  | -
﻿Receivables from broker, dealers, and clearing organizations |  |  | 823 |  |  | 823 |  |  | - |  |  | 823 |  |  | -
﻿Interest receivable |  |  | 116 |  |  | 116 |  |  | - |  |  | 116 |  |  | -
﻿Other assets |  |  | 6 |  |  | 6 |  |  | - |  |  | 6 |  |  | -
﻿Total financial assets, not measured at fair value |  | $ | 53,203 |  | $ | 53,203 |  | $ | 8,279 |  | $ | 44,924 |  | $ | -
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Financial liabilities, not measured at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Short-term borrowings |  | $ | 15 |  | $ | 15 |  | $ | - |  | $ | 15 |  | $ | -
﻿Securities loaned |  |  | 4,444 |  |  | 4,444 |  |  | - |  |  | 4,444 |  |  | -
﻿Securities sold under agreements to repurchase |  |  | 1,316 |  |  | 1,316 |  |  | - |  |  | 1,316 |  |  | -
﻿Payables to customer |  |  | 47,548 |  |  | 47,548 |  |  | - |  |  | 47,548 |  |  | -
﻿Payables to brokers, dealers and clearing organizations |  |  | 283 |  |  | 283 |  |  | - |  |  | 283 |  |  | -
﻿Interest payable |  |  | 22 |  |  | 22 |  |  | - |  |  | 22 |  |  | -
﻿Total financial liabilities, not measured at fair value |  | $ | 53,628 |  | $ | 53,628 |  | $ | - |  | $ | 53,628 |  | $ | -
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ ﻿ ﻿ ﻿ ﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | December 31, 2016
﻿ |  | Carrying Value |  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3
﻿ |  | (in millions)
﻿Financial assets, not measured at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cash and cash equivalents |  | $ | 1,925 |  | $ | 1,925 |  | $ | 1,925 |  | $ | - |  | $ | -
﻿Cash and securities segregated for regulatory purposes |  |  | 16,619 |  |  | 16,619 |  |  | 5,624 |  |  | 10,995 |  |  | -
﻿Securities borrowed |  |  | 3,629 |  |  | 3,629 |  |  | - |  |  | 3,629 |  |  | -
﻿Securities purchased under agreements to resell |  |  | 111 |  |  | 111 |  |  | - |  |  | 111 |  |  | -
﻿Receivables from customer |  |  | 19,409 |  |  | 19,409 |  |  | - |  |  | 19,409 |  |  |
﻿Receivables from broker, dealers, and clearing organizations |  |  | 1,040 |  |  | 1,040 |  |  | - |  |  | 1,040 |  |  | -
﻿Interest receivable |  |  | 57 |  |  | 57 |  |  | - |  |  | 57 |  |  | -
﻿Other assets |  |  | 28 |  |  | 32 |  |  | - |  |  | 32 |  |  | -
﻿Total financial assets, not measured at fair value |  | $ | 42,818 |  | $ | 42,822 |  | $ | 7,549 |  | $ | 35,273 |  | $ | -
﻿ ﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Financial liabilities, not measured at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Short-term borrowings |  | $ | 74 |  | $ | 74 |  | $ | - |  | $ | 74 |  | $ | -
﻿Securities loaned |  |  | 4,293 |  |  | 4,293 |  |  | - |  |  | 4,293 |  |  | -
﻿Payables to customer |  |  | 41,731 |  |  | 41,731 |  |  | - |  |  | 41,731 |  |  | -
﻿Payables to brokers, dealers and clearing organizations |  |  | 239 |  |  | 239 |  |  | - |  |  | 239 |  |  | -
﻿Interest payable |  |  | 6 |  |  | 6 |  |  | - |  |  | 6 |  |  | -
﻿Total financial liabilities, not measured at fair value |  | $ | 46,343 |  | $ | 46,343 |  | $ | - |  | $ | 46,343 |  | $ | -
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿
Offsetting Assets | ﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | December 31, 2017 |  |  |  |  |  |
﻿ |  | Gross |  |  |  |  |  |  | Amounts Not Offset |  |  |
﻿ |  | Amounts |  | Amounts |  |  | Net Amounts |  | in the |  |  |
﻿ |  | of Financial |  | Offset in the |  |  | Presented in the |  | Consolidated Statement |  |  |
﻿ |  | Assets and |  | Consolidated |  |  | Consolidated |  | of Financial Condition |  |  |
﻿ |  | Liabilities |  | Statement of |  |  | Statement of |  | Cash or Financial |  |  |
﻿ |  | Recognized |  | Financial Condition | 2 |  | Financial Condition |  | Instruments |  | Net Amount
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Offsetting of Financial Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Securities segregated for regulatory purposes - purchased under agreements to resell |  | $ | 9,166 | 1 |  | $ | — |  |  | $ | 9,166 |  | $ | (9,166) |  | $ | —
﻿Securities borrowed |  |  | 2,957 |  |  |  | — |  |  |  | 2,957 |  |  | (2,822) |  |  | 135
﻿Securities purchased under agreements to resell |  |  | 2,035 |  |  |  | — |  |  |  | 2,035 |  |  | (2,035) |  |  | —
﻿Financial Instruments owned, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Options |  |  | 1,052 |  |  |  | — |  |  |  | 1,052 |  |  | (451) |  |  | 601
﻿Warrants and discount certificates |  |  | 5 |  |  |  | — |  |  |  | 5 |  |  | — |  |  | 5
﻿Currency forward contracts |  |  | 32 |  |  |  | — |  |  |  | 32 |  |  | — |  |  | 32
﻿Total |  | $ | 15,247 |  |  | $ | — |  |  | $ | 15,247 |  | $ | (14,474) |  | $ | 773
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | December 31, 2016 |  |  |  |  |  |
﻿ |  |  | Gross |  |  |  |  |  | Amounts Not Offset |  |  |
﻿ |  |  | Amounts | Amounts |  |  | Net Amounts |  | in the |  |  |
﻿ |  |  | of Financial | Offset in the |  |  | Presented in the |  | Consolidated Statement |  |  |
﻿ |  |  | Assets and | Consolidated |  |  | Consolidated |  | of Financial Condition |  |  |
﻿ |  |  | Liabilities | Statement of |  |  | Statement of |  | Cash or Financial |  |  |
﻿ |  |  | Recognized |  | Financial Condition | 2 |  | Financial Condition |  | Instruments |  | Net Amount
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Offsetting of Financial Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Securities segregated for regulatory purposes - purchased under agreements to resell |  | $ | 10,995 | 1 |  | $ | — |  |  | $ | 10,995 |  | $ | (10,995) |  | $ | —
﻿Securities borrowed |  |  | 3,629 |  |  |  | — |  |  |  | 3,629 |  |  | (3,488) |  |  | 141
﻿Securities purchased under agreements to resell |  |  | 111 |  |  |  | — |  |  |  | 111 |  |  | (111) |  |  | —
﻿Financial Instruments owned, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Options |  |  | 1,804 |  |  |  | — |  |  |  | 1,804 |  |  | (1,230) |  |  | 574
﻿Warrants and discount certificates |  |  | 43 |  |  |  | — |  |  |  | 43 |  |  | (1) |  |  | 42
﻿Currency forward contracts |  |  | 3 |  |  |  | — |  |  |  | 3 |  |  | — |  |  | 3
﻿Total |  | $ | 16,585 |  |  | $ | — |  |  | $ | 16,585 |  | $ | (15,825) |  | $ | 760
﻿ ﻿ ﻿ ﻿
| (1) |  | As of December 31, 2017 and December 31, 2016, the Company had $9.2 billion and $11.0 billion, respectively, of securities purchased under agreements to resell that were segregated to satisfy regulatory requirements. These securities are included in “Cash and securities - segregated for regulatory purposes” in the consolidated statements of financial condition.
| (2) |  | The Company did not have any balances eligible for netting in accordance with ASC Topic 210-20 at December 31, 2017 and 2016.
Offsetting Liabilities | ﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Offsetting of Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Securities loaned |  | $ | 4,444 |  |  | $ | — |  |  | $ | 4,444 |  | $ | (4,201) |  | $ | 243
﻿Securities sold under agreements to repurchase |  |  | 1,316 |  |  |  | — |  |  |  | 1,316 |  |  | (1,316) |  |  | —
﻿Financial instruments sold, but not yet purchased, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Options |  |  | 464 |  |  |  | — |  |  |  | 464 |  |  | (451) |  |  | 13
﻿Warrants and discount certificates |  |  | — |  |  |  | — |  |  |  | — |  |  | — |  |  | —
﻿Currency forward contracts |  |  | 1 |  |  |  | — |  |  |  | 1 |  |  | — |  |  | 1
﻿Total |  | $ | 6,225 |  |  | $ | — |  |  | $ | 6,225 |  | $ | (5,968) |  | $ | 257
﻿ ﻿ ﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Offsetting of Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Securities loaned |  | $ | 4,293 |  |  | $ | — |  |  | $ | 4,293 |  | $ | (4,158) |  | $ | 135
﻿Financial instruments sold, but not yet purchased, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Options |  |  | 1,286 |  |  |  | — |  |  |  | 1,286 |  |  | (1,230) |  |  | 56
﻿Warrants and discount certificates |  |  | 1 |  |  |  | — |  |  |  | 1 |  |  | (1) |  |  | —
﻿Currency forward contracts |  |  | 19 |  |  |  | — |  |  |  | 19 |  |  | — |  |  | 19
﻿Total |  | $ | 5,599 |  |  | $ | — |  |  | $ | 5,599 |  | $ | (5,389) |  | $ | 210
﻿
| (1) |  | As of December 31, 2017 and December 31, 2016, the Company had $9.2 billion and $11.0 billion, respectively, of securities purchased under agreements to resell that were segregated to satisfy regulatory requirements. These securities are included in “Cash and securities - segregated for regulatory purposes” in the consolidated statements of financial condition.
| (2) |  | The Company did not have any balances eligible for netting in accordance with ASC Topic 210-20 at December 31, 2017 and 2016.
﻿ ﻿
Schedule of Securities Financing Transactions | ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | December 31, 2017
﻿ |  | Remaining Contractual Maturity
﻿ |  | Overnight |  | Less than |  | 30 – 90 |  | Over 90 |  |  |
﻿ |  | and Open |  | 30 days |  | days |  | days |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Securities loaned |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ Stocks |  | $ | 4,389 |  | $ | - |  | $ | - |  | $ | - |  | $ | 4,389
﻿ Corporate bonds |  |  | 55 |  |  | - |  |  | - |  |  | - |  |  | 55
﻿Total securities loaned |  |  | 4,444 |  |  | - |  |  | - |  |  | - |  |  | 4,444
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Securities sold under agreements to repurchase |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ U.S. government securities |  |  | 1,316 |  |  | - |  |  | - |  |  | - |  |  | 1,316
﻿ Total |  | $ | 5,760 |  | $ | - |  | $ | - |  | $ | - |  | $ | 5,760
﻿ ﻿ ﻿ ﻿ ﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | December 31, 2016
﻿ |  | Remaining Contractual Maturity
﻿ |  | Overnight |  | Less than |  | 30 – 90 |  | Over 90 |  |  |
﻿ |  | and Open |  | 30 days |  | days |  | days |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Securities Loaned |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ Stocks |  | $ | 4,269 |  | $ | - |  | $ | - |  | $ | - |  | $ | 4,269
﻿ Corporate bonds |  |  | 24 |  |  | - |  |  | - |  |  | - |  |  | 24
﻿Total |  | $ | 4,293 |  | $ | - |  | $ | - |  | $ | - |  | $ | 4,293
﻿

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
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