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Financial Assets And Financial Liabilities (Netting of Financial Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Offsetting Securities Loaned [Abstract] |  |  |
Gross Amounts of Financial Assets Recognized |  | $ 11,347 | $ 8,940
Amounts Offset in the Condensed Consolidated Statement of Financial Condition | [1] |  |
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition |  | 11,347 | 8,940
Amounts of Liabilities Not Offset in the Condensed Consolidated Statement of Financial Condition (Cash or Financial Instruments) |  | (10,443) | (8,260)
Net Amount |  | 904 | 680
Total [Abstract] |  |  |
Gross Amounts of Financial Assets Recognized |  | 11,456 | 8,958
Amounts Offset in the Consolidated Statement of Financial Condition | [1] |  |
Net Amounts Presented in the Consolidated Statement of Financial Condition |  | 11,456 | 8,958
Amounts of Liabilities Not Offset in the Consolidated Statement of Financial Condition (Cash or Financial Instruments) |  | (10,547) | (8,276)
Net Amount |  | 909 | 682
Options [Member] |  |  |
Offsetting Financial Instruments Sold, But Not Yet Purchased, At Fair Value [Abstract] |  |  |
Gross Amounts of Financial Assets Recognized |  | 104 | 16
Amounts Offset in the Condensed Consolidated Statement of Financial Condition | [1] |  |
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition |  | 104 | 16
Amounts of Liabilities Not Offset in the Condensed Consolidated Statement of Financial Condition (Cash or Financial Instruments) |  | (104) | (16)
Net Amount |  |  |
Currency Forward Contracts [Member] |  |  |
Offsetting Financial Instruments Sold, But Not Yet Purchased, At Fair Value [Abstract] |  |  |
Gross Amounts of Financial Assets Recognized |  | 5 | 2
Amounts Offset in the Condensed Consolidated Statement of Financial Condition | [1] |  |
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition |  | 5 | 2
Amounts of Liabilities Not Offset in the Condensed Consolidated Statement of Financial Condition (Cash or Financial Instruments) |  |  |
Net Amount |  | $ 5 | $ 2
[1] | The Company did not have any balances eligible for netting in accordance with ASC Topic 210-20 at December 31, 2023 and 2022.

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