Equity And Earnings Per Share (IBG LLC Ownership of Member Interests) (Details) |
Jun. 30, 2025
shares
|
|---|---|
| Ownership Percentage | 100.00% |
| Membership Interests | 1,696,143,000 |
| IBG Inc [Member] | |
| Ownership Percentage | 26.00% |
| Membership Interests | 441,569,584 |
| Holdings [Member] | |
| Ownership Percentage | 74.00% |
| Membership Interests | 1,254,573,416 |