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

Net Capital/

Eligible Equity

Requirement

Excess

(in millions)

IB LLC

$

5,796

$

773

$

5,023

IBKRFS

552

12

540

IBHK

931

217

714

Other regulated operating subsidiaries

1,666

274

1,392

$

8,945

$

1,276

$

7,669