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Regulatory Requirements (Tables)
 3 Months Ended
Mar. 31, 2023
Regulatory Requirements [Abstract]  
Summary Of Capital, Capital Requirements And Excess Capital

Net Capital/

Eligible Equity

Requirement

Excess

(in millions)

IB LLC

$

6,537

$

705

$

5,832

IBHK

1,014

208

806

IBIE

618

149

469

Other regulated operating subsidiaries

1,997

120

1,877

$

10,166

$

1,182

$

8,984