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Financial Assets And Financial Liabilities (Netting of Financial Liabilities) (Details) - USD ($) $ in Millions		Sep. 30, 2022	Dec. 31, 2021
Offsetting Securities Loaned [Abstract]
Gross Amounts of Financial Assets Recognized		$ 9,490	$ 11,769
Amounts Offset in the Condensed Consolidated Statement of Financial Condition	[1]
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition		9,490	11,769
Amounts of Liabilities Not Offset in the Condensed Consolidated Statement of Financial Condition (Cash or Financial Instruments)		(8,851)	(10,992)
Net Amount		639	777
Total [Abstract]
Gross Amounts of Financial Assets Recognized		9,730	11,801
Amounts Offset in the Consolidated Statement of Financial Condition	[1]
Net Amounts Presented in the Consolidated Statement of Financial Condition		9,730	11,801
Amounts of Liabilities Not Offset in the Consolidated Statement of Financial Condition (Cash or Financial Instruments)		(9,083)	(11,011)
Net Amount		647	790
Options [Member]
Offsetting Financial Instruments Sold, But Not Yet Purchased, At Fair Value [Abstract]
Gross Amounts of Financial Assets Recognized		232	22
Amounts Offset in the Condensed Consolidated Statement of Financial Condition	[1]
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition		232	22
Amounts of Liabilities Not Offset in the Condensed Consolidated Statement of Financial Condition (Cash or Financial Instruments)		(232)	(19)
Net Amount			3
Currency Forward Contracts [Member]
Offsetting Financial Instruments Sold, But Not Yet Purchased, At Fair Value [Abstract]
Gross Amounts of Financial Assets Recognized		8	10
Amounts Offset in the Condensed Consolidated Statement of Financial Condition	[1]
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition		8	10
Amounts of Liabilities Not Offset in the Condensed Consolidated Statement of Financial Condition (Cash or Financial Instruments)
Net Amount		$ 8	$ 10
[1] The Company did not have any balances eligible for netting in accordance with ASC Topic 210-20 as of September 30, 2022 and December 31, 2021.

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