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Regulatory Requirements (Tables)
 9 Months Ended
Sep. 30, 2022
Regulatory Requirements [Abstract]  
Summary Of Capital, Capital Requirements And Excess Capital

Net Capital/

Eligible Equity

Requirement

Excess

(in millions)

IB LLC

$

6,130

$

740

$

5,390

IBKRFS

517

12

505

IBHK

975

206

769

Other regulated operating subsidiaries

1,716

262

1,454

$

9,338

$

1,220

$

8,118