Regulatory Requirements - Net Capital and Net Capital Requirements (Details) - Charles Schwab & Co., Inc. - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] | ||
| Net capital | $ 16,124,000 | $ 13,188,000 |
| Minimum dollar requirement | 250 | 250 |
| 2% of aggregate debit balances | 3,546,000 | 2,559,000 |
| Net capital in excess of required net capital | $ 12,578,000 | $ 10,629,000 |