Segment, Geographic and Revenue Information - Assets by Business Segment (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Segment Reporting Information
Assets	$ 1,228,503	$ 1,193,693
Institutional Securities
Segment Reporting Information
Assets	832,693	810,506
Wealth Management
Segment Reporting Information
Assets	377,924	365,168
Investment Management
Segment Reporting Information
Assets	$ 17,886	$ 18,019

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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+ Details