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Cash and Securities Segregated Under Federal Regulations and Other Requirements
12 Months Ended
Dec. 31, 2022
Broker-Dealer [Abstract]  
Cash and Securities Segregated Under Federal Regulations and Other Requirements Cash and Securities Segregated Under Federal Regulations and Other RequirementsAs of both December 31, 2022 and 2021, $1.5 billion of U.S. Treasury Bills were segregated in a special reserve bank custody account for the exclusive benefit of our brokerage customers under Rule 15c3-3 of the Exchange Act.