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Regulatory Requirements (Tables)
 6 Months Ended
Jun. 30, 2024
Regulatory Requirements [Abstract]  
Summary Of Capital, Capital Requirements And Excess Capital

Net Capital/

Eligible Equity

Requirement

Excess

(in millions)

IB LLC

$

8,116

$

1,062

$

7,054

IBHK

1,158

312

846

IBIE

820

210

610

Other regulated operating subsidiaries

2,551

157

2,394

$

12,645

$

1,741

$

10,904