Equity And Earnings Per Share (IBG LLC Ownership of Member Interests) (Details) |
Dec. 31, 2025
shares
|
|---|---|
| Ownership Percentage | 100.00% |
| Membership Interests | 1,696,350,241 |
| IBG Inc [Member] | |
| Ownership Percentage | 26.30% |
| Membership Interests | 445,612,825 |
| Holdings [Member] | |
| Ownership Percentage | 73.70% |
| Membership Interests | 1,250,737,416 |