v3.26.1
Regulatory Requirements - Narrative (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total assets $ 493,319 $ 490,995
Charles Schwab Premier Bank, SSB    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total assets 27,400 27,000
Charles Schwab Trust Bank    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total assets $ 10,400 $ 10,400