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Regulatory Requirements - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total assets	$ 458,936	$ 479,843
Charles Schwab Premier Bank, SSB
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total assets	24,400
Charles Schwab Trust Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total assets	$ 9,700

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