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Regulatory Requirements (Tables)
 6 Months Ended
Jun. 30, 2023
Regulatory Requirements [Abstract]  
Summary Of Capital, Capital Requirements And Excess Capital

Net Capital/

Eligible Equity

Requirement

Excess

(in millions)

IB LLC

$

6,871

$

794

$

6,077

IBHK

1,080

208

872

IBIE

676

162

514

Other regulated operating subsidiaries

2,091

125

1,966

$

10,718

$

1,289

$

9,429