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Regulatory Requirements (Summary Of Capital, Capital Requirements And Excess Capital) (Details) $ in Millions	Dec. 31, 2023 USD ($)
Net Capital / Eligible Equity	$ 11,602
Requirement	1,377
Excess	10,225
IB LLC [Member]
Net Capital / Eligible Equity	7,319
Requirement	823
Excess	6,496
IBHK [Member]
Net Capital / Eligible Equity	1,265
Requirement	223
Excess	1,042
IBIE [Member]
Net Capital / Eligible Equity	685
Requirement	189
Excess	496
Other Regulated Operating Companies [Member]
Net Capital / Eligible Equity	2,333
Requirement	142
Excess	$ 2,191

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.

+ Details

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X

- 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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X

- 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//1943274/2147480696/942-505-50-1

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- Details

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- Details

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