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Segment, Geographic and Revenue Information - Assets by Business Segment (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information    
Assets $ 1,188,140 $ 1,115,862
Institutional Securities    
Segment Reporting Information    
Assets 792,135 753,322
Wealth Management    
Segment Reporting Information    
Assets 378,438 355,595
Investment Management    
Segment Reporting Information    
Assets $ 17,567 $ 6,945