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Financial Assets And Financial Liabilities (Financial Assets and Liabilities Not Measured at Fair Value) (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Cash and cash equivalents | $ 2,882 | $ 2,597 | $ 1,732
Cash - segregated for regulatory purposes | 9,400 | 7,503 | $ 6,547
Securities - segregated for regulatory purposes | 17,824 | 15,595 |
Securities borrowed | 3,916 | 3,331 |
Securities purchased under agreements to resell | 3,111 | 1,242 |
Receivables from customer | 31,304 | 27,017 |
Receivables from brokers, dealers and clearing organizations | 685 | 706 |
Interest Receivable | 158 | 141 |
Other assets | 480 | 296 |
Short-term borrowings | 16 | 17 |
Securities loaned | 4,410 | 4,037 |
Securities sold under agreements to repurchase | 1,909 |  |
Customers | 56,248 | 47,993 |
Brokers, dealers and clearing organizations | 220 | 298 |
Interest Payable | 29 | 41 |
at Fair Value |  |  |
Cash and cash equivalents | 2,882 | 2,597 |
Cash - segregated for regulatory purposes | 9,400 | 7,503 |
Securities - segregated for regulatory purposes | 14,027 | 11,382 |
Securities borrowed | 3,916 | 3,331 |
Securities purchased under agreements to resell | 3,111 | 1,242 |
Receivables from customer | 31,304 | 27,017 |
Receivables from brokers, dealers and clearing organizations | 685 | 706 |
Interest Receivable | 158 | 141 |
Other assets | 9 | 6 |
Total financial assets, not measured at fair value | 65,492 | 53,925 |
Short-term borrowings | 16 | 17 |
Securities loaned | 4,410 | 4,037 |
Securities sold under agreements to repurchase | 1,909 |  |
Customers | 56,248 | 47,993 |
Brokers, dealers and clearing organizations | 220 | 298 |
Interest Payable | 29 | 41 |
Total financial liabilities, not measured at fair value | 62,832 | 52,386 |
Carrying Value |  |  |
Cash and cash equivalents | 2,882 | 2,597 |
Cash - segregated for regulatory purposes | 9,400 | 7,503 |
Securities - segregated for regulatory purposes | 14,027 | 11,382 |
Securities borrowed | 3,916 | 3,331 |
Securities purchased under agreements to resell | 3,111 | 1,242 |
Receivables from customer | 31,304 | 27,017 |
Receivables from brokers, dealers and clearing organizations | 685 | 706 |
Interest Receivable | 158 | 141 |
Other assets | 9 | 5 |
Total financial assets, not measured at fair value | 65,492 | 53,924 |
Short-term borrowings | 16 | 17 |
Securities loaned | 4,410 | 4,037 |
Securities sold under agreements to repurchase | 1,909 |  |
Customers | 56,248 | 47,993 |
Brokers, dealers and clearing organizations | 220 | 298 |
Interest Payable | 29 | 41 |
Total financial liabilities, not measured at fair value | 62,832 | 52,386 |
Level 1 |  |  |
Cash and cash equivalents | 2,882 | 2,597 |
Cash - segregated for regulatory purposes | 9,400 | 7,503 |
Total financial assets, not measured at fair value | 12,282 | 10,100 |
Short-term borrowings |  |  |
Securities loaned |  |  |
Securities sold under agreements to repurchase |  |  |
Customers |  |  |
Brokers, dealers and clearing organizations |  |  |
Interest Payable |  |  |
Total financial liabilities, not measured at fair value |  |  |
Level 2 |  |  |
Securities - segregated for regulatory purposes | 14,027 | 11,382 |
Securities borrowed | 3,916 | 3,331 |
Securities purchased under agreements to resell | 3,111 | 1,242 |
Receivables from customer | 31,304 | 27,017 |
Receivables from brokers, dealers and clearing organizations | 685 | 706 |
Interest Receivable | 158 | 141 |
Other assets | 3 | 6 |
Total financial assets, not measured at fair value | 53,204 | 43,825 |
Short-term borrowings | 16 | 17 |
Securities loaned | 4,410 | 4,037 |
Securities sold under agreements to repurchase | 1,909 |  |
Customers | 56,248 | 47,993 |
Brokers, dealers and clearing organizations | 220 | 298 |
Interest Payable | 29 | 41 |
Total financial liabilities, not measured at fair value | 62,832 | 52,386 |
Level 3 |  |  |
Cash and cash equivalents |  |  |
Cash - segregated for regulatory purposes |  |  |
Securities - segregated for regulatory purposes |  |  |
Securities borrowed |  |  |
Securities purchased under agreements to resell |  |  |
Receivables from customer |  |  |
Receivables from brokers, dealers and clearing organizations |  |  |
Interest Receivable |  |  |
Other assets | 6 |  |
Total financial assets, not measured at fair value | 6 |  |
Short-term borrowings |  |  |
Securities loaned |  |  |
Securities sold under agreements to repurchase |  |  |
Customers |  |  |
Brokers, dealers and clearing organizations |  |  |
Interest Payable |  |  |
Total financial liabilities, not measured at fair value |  |  |

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