Regulatory Requirements (Narrative) (Details) - USD ($) $ in Millions		Jun. 30, 2023	Dec. 31, 2022
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total assets	[1]	$ 511,505	$ 551,772
Charles Schwab Premier Bank, SSB [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total assets		29,900
Charles Schwab Trust Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total assets		$ 11,800

[1] Certain prior year amounts have been reclassified to conform to the current year presentation. See Note 1 for additional information.