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Regulatory Requirements (Summary Of Capital, Capital Requirements And Excess Capital) (Details) $ in Millions	Jun. 30, 2024 USD ($)
Net Capital / Eligible Equity	$ 12,645
Requirement	1,741
Excess	10,904
IB LLC [Member]
Net Capital / Eligible Equity	8,116
Requirement	1,062
Excess	7,054
IBHK [Member]
Net Capital / Eligible Equity	1,158
Requirement	312
Excess	846
IBIE [Member]
Net Capital / Eligible Equity	820
Requirement	210
Excess	610
Other Regulated Operating Companies [Member]
Net Capital / Eligible Equity	2,551
Requirement	157
Excess	$ 2,394

X

- Definition

Eligible equity is equal to the sum of audited capital and reserves and the eligible portion of subordinated debt. Net capital is equal to the net worth of the broker dealer, less certain items such as exchange memberships, carrying value of securities not readily marketable, haircuts on marketable securities in proprietary accounts, furniture and equipment and other illiquid assets as defined.

+ References

No definition available.

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- Definition

Minimum amount of net capital required to be maintained by broker-dealer parent, calculated under Aggregate Indebtedness Standard.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Rule 15c3-1
-Number 240
-Section 15c3-1
-Publisher SEC

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- Definition

Amount of total risk-based capital exceeding minimum required for capital adequacy as defined by regulatory framework.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

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- Details

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