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Financial Assets And Financial Liabilities (Netting of Financial Assets) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Securities, Segregated For Regulatory Purposes, Purchased Under Agreements To Resell [Abstract] |  |  |
Gross Amounts of Financial Assets Recognized | [1] | $ 25,609 | $ 27,058
Amounts Offset in the Condensed Consolidated Statement of Financial Condition | [2] |  |
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition |  | 25,609 | 27,058
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments |  | (25,609) | (27,058)
Net Amount |  |  |
Offsetting Securities Borrowed [Abstract] |  |  |
Gross Amounts of Financial Assets Recognized |  | 5,478 | 4,749
Amounts Offset in the Condensed Consolidated Statement of Financial Condition | [2] |  |
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition |  | 5,478 | 4,749
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments |  | (5,307) | (4,597)
Net Amount |  | 171 | 152
Offsetting Securities Purchased under Agreements to Resell [Abstract] |  |  |
Gross Amounts of Financial Assets Recognized |  | 5,480 | 6,029
Amounts Offset in the Condensed Consolidated Statement of Financial Condition | [2] |  |
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition |  | 5,480 | 6,029
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments |  | (5,480) | (6,029)
Net Amount |  |  |
Total [Abstract] |  |  |
Gross Amounts of Financial Assets Recognized |  | 36,943 | 37,897
Amounts Offset in the Condensed Consolidated Statement of Financial Condition | [2] |  |
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition |  | 36,943 | 37,897
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments |  | (36,430) | (37,700)
Net Amount |  | 513 | 197
Options [Member] |  |  |
Offsetting Financial Instruments Owned, At Fair Value [Abstract] |  |  |
Gross Amounts of Financial Assets Recognized |  | 374 | 31
Amounts Offset in the Condensed Consolidated Statement of Financial Condition | [2] |  |
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition |  | 374 | 31
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments |  | (34) | (16)
Net Amount |  | 340 | 15
Currency Forward Contracts [Member] |  |  |
Offsetting Financial Instruments Owned, At Fair Value [Abstract] |  |  |
Gross Amounts of Financial Assets Recognized |  | 2 | 30
Amounts Offset in the Condensed Consolidated Statement of Financial Condition | [2] |  |
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition |  | 2 | 30
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments |  |  |
Net Amount |  | $ 2 | $ 30
[1] | As of September 30, 2023 and December 31, 2022, the Company had $25.6 billion and $27.1 billion, respectively, of securities purchased under agreements to resell that were segregated to satisfy regulatory requirements. These securities are included in “Securities – segregated for regulatory purposes” in the condensed consolidated statements of financial condition.
[2] | The Company did not have any balances eligible for netting in accordance with ASC Topic 210-20 at September 30, 2023 and December 31, 2022.

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