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Cash and Securities Segregated Under Federal Regulations and Other Requirements	12 Months Ended
	Dec. 31, 2025
Broker-Dealer [Abstract]
Cash and Securities Segregated Under Federal Regulations and Other Requirements	Cash and Securities Segregated Under Federal Regulations and Other Requirements As of December 31, 2025 and 2024, $0.5 billion and $0.5 billion, respectively, 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.