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Financial Assets And Financial Liabilities (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Financial Assets And Financial Liabilities [Abstract] |  |
Fair Value Table |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Financial Assets At Fair Value as of September 30, 2016
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Securities segregated for regulatory purposes |  | $ | 12,063 |  | $ | — |  | $ | — |  | $ | 12,063
﻿Financial instruments owned |  |  |  |  |  |  |  |  |  |  |  |
﻿Stocks |  |  | 1,884 |  |  | — |  |  | — |  |  | 1,884
﻿Options |  |  | 1,578 |  |  | — |  |  | — |  |  | 1,578
﻿Warrants and discount certificates |  |  | 57 |  |  | — |  |  | — |  |  | 57
﻿U.S. and foreign government securities |  |  | 296 |  |  | — |  |  | — |  |  | 296
﻿Corporate and municipal bonds |  |  | — |  |  | 3 |  |  | — |  |  | 3
﻿Currency forward contracts |  |  | — |  |  | 5 |  |  | — |  |  | 5
﻿Total financial instruments owned, at fair value |  |  | 3,815 |  |  | 8 |  |  | — |  |  | 3,823
﻿Total financial assets at fair value |  | $ | 15,878 |  | $ | 8 |  | $ | — |  | $ | 15,886
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Financial Liabilities At Fair Value as of September 30, 2016
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Financial instruments sold, but not yet purchased, at fair value |  |  |  |  |  |  |  |  |  |  |  |
﻿Stocks |  | $ | 1,398 |  | $ | — |  | $ | 1 |  | $ | 1,399
﻿Options |  |  | 1,058 |  |  | — |  |  | — |  |  | 1,058
﻿Warrants and discount certificates |  |  | 1 |  |  | — |  |  | — |  |  | 1
﻿Currency forward contracts |  |  | — |  |  | 1 |  |  | — |  |  | 1
﻿Total financial instruments sold, but not yet purchased, at fair value |  |  | 2,457 |  |  | 1 |  |  | 1 |  |  | 2,459
﻿Total financial liabilities at fair value |  | $ | 2,457 |  | $ | 1 |  | $ | 1 |  | $ | 2,459
﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Financial Assets At Fair Value as of December 31, 2015
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Securities segregated for regulatory purposes |  | $ | 15,214 |  | $ | — |  | $ | — |  | $ | 15,214
﻿Financial instruments owned, at fair value |  |  |  |  |  |  |  |  |  |  |  |
﻿Stocks |  |  | 1,650 |  |  | — |  |  | — |  |  | 1,650
﻿Options |  |  | 1,156 |  |  | — |  |  | — |  |  | 1,156
﻿Warrants and discount certificates |  |  | 81 |  |  | — |  |  | — |  |  | 81
﻿U.S. and foreign government securities |  |  | 527 |  |  | — |  |  | — |  |  | 527
﻿Corporate and municipal bonds |  |  | — |  |  | 3 |  |  | — |  |  | 3
﻿Currency forward contracts |  |  | — |  |  | 3 |  |  | — |  |  | 3
﻿Total financial instruments owned, at fair value |  |  | 3,414 |  |  | 6 |  |  | — |  |  | 3,420
﻿Total financial assets at fair value |  | $ | 18,628 |  | $ | 6 |  | $ | — |  | $ | 18,634
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Financial Liabilities At Fair Value as of December 31, 2015
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Financial instruments sold, but not yet purchased, at fair value |  |  |  |  |  |  |  |  |  |  |  |
﻿Stocks |  | $ | 1,565 |  | $ | — |  | $ | — |  | $ | 1,565
﻿Options |  |  | 1,042 |  |  | — |  |  | — |  |  | 1,042
﻿Warrants and discount certificates |  |  | 1 |  |  | — |  |  | — |  |  | 1
﻿Currency forward contracts |  |  | — |  |  | 9 |  |  | — |  |  | 9
﻿Total financial instruments sold, but not yet purchased, at fair value |  |  | 2,608 |  |  | 9 |  |  | — |  |  | 2,617
﻿Total financial liabilities at fair value |  | $ | 2,608 |  | $ | 9 |  | $ | — |  | $ | 2,617
﻿ |
Trading Gains From Market Making Transactions |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
﻿ |  | 2016 |  | 2015 |  | 2016 |  | 2015
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Equities |  | $ | 34 |  | $ | 83 |  | $ | 119 |  | $ | 204
﻿Fixed income |  |  | — |  |  | — |  |  | — |  |  | —
﻿Foreign exchange |  |  | 4 |  |  | 4 |  |  | 5 |  |  | 12
﻿Total trading gains, net |  | $ | 38 |  | $ | 87 |  | $ | 124 |  | $ | 216
﻿ |
Financial Assets and Liabilities Not Measured at Fair Value |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | September 30, 2016
﻿ |  | Carrying Value |  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Financial assets, not measured at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cash and cash equivalents |  | $ | 1,550 |  | $ | 1,550 |  | $ | 1,550 |  | $ | - |  | $ | -
﻿Cash and securities segregated for regulatory purposes |  |  | 13,187 |  |  | 13,187 |  |  | 6,224 |  |  | 6,963 |  |  | -
﻿Securities borrowed |  |  | 4,785 |  |  | 4,785 |  |  | - |  |  | 4,785 |  |  | -
﻿Securities purchased under agreements to resell |  |  | 148 |  |  | 148 |  |  | - |  |  | 148 |  |  | -
﻿Receivables from customer |  |  | 18,223 |  |  | 18,223 |  |  | - |  |  | 18,223 |  |  | -
﻿Receivables from broker, dealers, and clearing organizations |  |  | 764 |  |  | 764 |  |  | - |  |  | 764 |  |  | -
﻿Interest receivable |  |  | 66 |  |  | 66 |  |  | - |  |  | 66 |  |  | -
﻿Other assets |  |  | 29 |  |  | 32 |  |  | - |  |  | 32 |  |  | -
﻿Total financial assets, not measured at fair value |  | $ | 38,752 |  | $ | 38,755 |  | $ | 7,774 |  | $ | 30,981 |  | $ | —
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Financial liabilities, not measured at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Short-term borrowings |  | $ | 24 |  | $ | 24 |  | $ | - |  | $ | 24 |  | $ | -
﻿Securities loaned |  |  | 3,617 |  |  | 3,617 |  |  | - |  |  | 3,617 |  |  | -
﻿Payables to customer |  |  | 42,486 |  |  | 42,486 |  |  | - |  |  | 42,486 |  |  | -
﻿Payables to brokers, dealers and clearing organizations |  |  | 210 |  |  | 210 |  |  | - |  |  | 210 |  |  | -
﻿Interest payable |  |  | 4 |  |  | 4 |  |  | - |  |  | 4 |  |  | -
﻿Total financial liabilities, not measured at fair value |  | $ | 46,341 |  | $ | 46,341 |  | $ | - |  | $ | 46,341 |  | $ | -
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | December 31, 2015
﻿ |  | Carrying Value |  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Financial assets, not measured at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cash and cash equivalents |  | $ | 1,601 |  | $ | 1,601 |  | $ | 1,601 |  | $ | - |  | $ | -
﻿Cash and securities segregated for regulatory purposes |  |  | 6,095 |  |  | 6,095 |  |  | 5,533 |  |  | 562 |  |  | -
﻿Securities borrowed |  |  | 3,924 |  |  | 3,924 |  |  | - |  |  | 3,924 |  |  | -
﻿Securities purchased under agreements to resell |  |  | 195 |  |  | 195 |  |  | - |  |  | 195 |  |  | -
﻿Receivables from customer |  |  | 17,050 |  |  | 17,050 |  |  | - |  |  | 17,050 |  |  |
﻿Receivables from broker, dealers, and clearing organizations |  |  | 692 |  |  | 692 |  |  | - |  |  | 692 |  |  | -
﻿Interest receivable |  |  | 63 |  |  | 63 |  |  | - |  |  | 63 |  |  | -
﻿Other assets |  |  | 28 |  |  | 31 |  |  | - |  |  | 31 |  |  | -
﻿Total financial assets, not measured at fair value |  | $ | 29,648 |  | $ | 29,651 |  | $ | 7,134 |  | $ | 22,517 |  | $ | —
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ ﻿ ﻿ ﻿ |
Offsetting Assets | ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | September 30, 2016 |  |  |  |  |  |
﻿ |  | Gross |  | Amounts |  |  | Net Amounts |  | Amounts Not Offset |  |  |
﻿ |  | Amounts |  | Offset in the |  |  | Presented in |  | in the Condensed |  |  |
﻿ |  | of Financial |  | Condensed |  |  | Condensed |  | 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 |  | $ | 6,963 | 1 |  | $ | — |  |  | $ | 6,963 |  | $ | (6,963) |  | $ | —
﻿Securities borrowed |  |  | 4,785 |  |  |  | — |  |  |  | 4,785 |  |  | (4,640) |  |  | 145
﻿Securities purchased under agreements to resell |  |  | 148 |  |  |  | — |  |  |  | 148 |  |  | (148) |  |  | —
﻿Financial Instruments owned, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Options |  |  | 1,578 |  |  |  | — |  |  |  | 1,578 |  |  | (1,031) |  |  | 547
﻿Warrants and discount certificates |  |  | 57 |  |  |  | — |  |  |  | 57 |  |  | (1) |  |  | 56
﻿Currency forward contracts |  |  | 5 |  |  |  | — |  |  |  | 5 |  |  | — |  |  | 5
﻿Total |  | $ | 13,536 |  |  | $ | — |  |  | $ | 13,536 |  | $ | (12,783) |  | $ | 753
﻿ | ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | December 31, 2015 |  |  |  |  |  |
﻿ |  |  | Gross | Amounts |  |  | Net Amounts |  | Amounts Not Offset |  |  |
﻿ |  |  | Amounts | Offset in the |  |  | Presented in |  | in the Condensed |  |  |
﻿ |  |  | of Financial | Condensed |  |  | Condensed |  | 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 |  | $ | 562 | 1 |  | $ | — |  |  | $ | 562 |  | $ | (562) |  | $ | —
﻿Securities borrowed |  |  | 3,924 |  |  |  | — |  |  |  | 3,924 |  |  | (3,816) |  |  | 108
﻿Securities purchased under agreements to resell |  |  | 195 |  |  |  | — |  |  |  | 195 |  |  | (195) |  |  | —
﻿Financial Instruments owned, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Options |  |  | 1,156 |  |  |  | — |  |  |  | 1,156 |  |  | (1,032) |  |  | 124
﻿Warrants and discount certificates |  |  | 81 |  |  |  | — |  |  |  | 81 |  |  | (1) |  |  | 80
﻿Currency forward contracts |  |  | 3 |  |  |  | — |  |  |  | 3 |  |  | — |  |  | 3
﻿Total |  | $ | 5,921 |  |  | $ | — |  |  | $ | 5,921 |  | $ | (5,606) |  | $ | 315
﻿
Offsetting Liabilities | ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Offsetting of Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Securities loaned |  | $ | 3,617 |  |  | $ | — |  |  | $ | 3,617 |  | $ | (3,520) |  | $ | 97
﻿Financial instruments sold, but not yet purchased, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Options |  |  | 1,058 |  |  |  | — |  |  |  | 1,058 |  |  | (1,031) |  |  | 27
﻿Warrants and discount certificates |  |  | 1 |  |  |  | — |  |  |  | 1 |  |  | (1) |  |  | —
﻿Currency forward contracts |  |  | 1 |  |  |  | — |  |  |  | 1 |  |  | — |  |  | 1
﻿Total |  | $ | 4,677 |  |  | $ | — |  |  | $ | 4,677 |  | $ | (4,552) |  | $ | 125
﻿ |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Offsetting of Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Securities loaned |  | $ | 2,894 |  |  | $ | — |  |  | $ | 2,894 |  | $ | (2,773) |  | $ | 121
﻿Financial instruments sold, but not yet purchased, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Options |  |  | 1,042 |  |  |  | — |  |  |  | 1,042 |  |  | (1,032) |  |  | 10
﻿Warrants and discount certificates |  |  | 1 |  |  |  | — |  |  |  | 1 |  |  | (1) |  |  | —
﻿Currency forward contracts |  |  | 9 |  |  |  | — |  |  |  | 9 |  |  | — |  |  | 9
﻿Total |  | $ | 3,946 |  |  | $ | — |  |  | $ | 3,946 |  | $ | (3,806) |  | $ | 140
﻿
Schedule of Securities Financing Transactions | ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | September 30, 2016
﻿ |  | Remaining Contractual Maturity
﻿ |  | Overnight |  | Less than |  | 30 – 90 |  | Over 90 |  |  |
﻿ |  | and Open |  | 30 days |  | days |  | days |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Securities Loaned |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ Stocks |  | $ | 3,590 |  | $ | - |  | $ | - |  | $ | - |  | $ | 3,590
﻿ Corporate bonds |  |  | 27 |  |  | - |  |  | - |  |  | - |  |  | 27
﻿Total |  | $ | 3,617 |  | $ | - |  | $ | - |  | $ | - |  | $ | 3,617
﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | December 31, 2015
﻿ |  | Remaining Contractual Maturity
﻿ |  | Overnight |  | Less than |  | 30 – 90 |  | Over 90 |  |  |
﻿ |  | and Open |  | 30 days |  | days |  | days |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Securities Loaned |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ Stocks |  | $ | 2,873 |  | $ | - |  | $ | - |  | $ | - |  | $ | 2,873
﻿ Corporate bonds |  |  | 21 |  |  | - |  |  | - |  |  | - |  |  | 21
﻿Total |  | $ | 2,894 |  | $ | - |  | $ | - |  | $ | - |  | $ | 2,894
﻿ |

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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 5 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19296-110258 + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13476-108611 Reference 2: 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=36462937&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of derivative and other financial assets that are subject to offsetting, including master netting arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225877-175312 + Details
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- Definition Tabular disclosure of derivative and other financial liabilities that are subject to offsetting, including master netting arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225877-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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