XML 41 R30.htm IDEA: XBRL DOCUMENT v3.21.2

Collateralized Transactions (Tables)

9 Months Ended

Sep. 30, 2021

Disclosure Collateralized Transactions [Abstract]

Amounts Related To Collateralized Transactions

		September 30, 2021						December 31, 2020
		Permitted			Sold or			Permitted			Sold or
		to Repledge			Repledged			to Repledge			Repledged
		(in millions)
Securities lending transactions		$	65,841		$	6,334		$	64,436		$	4,859
Securities purchased under agreements to resell transactions 1			16,570			14,820			23,859			23,832
Customer margin assets			60,259			14,682			47,609			14,182
		$	142,670		$	35,836		$	135,904		$	42,873

________________________

(1)As of September 30, 2021, $10.5 billion or 71% (as of December 31, 2020, $23.1 billion or 97%) of securities acquired through agreements to resell that are shown as repledged have been deposited in a separate bank account for the exclusive benefit of customers in accordance with SEC Rule 15c3-3.

Financial Instruments Owned and Pledged as Collateral (table)

		September 30,			December 31,
		2021			2020
		(in millions)
Stocks		$	44		$	53
U.S. and foreign government securities			33			33
		$	77		$	86

X

- Definition

Amounts Related to Collateralized Transactions [table]

+ References

No definition available.

+ Details

Name:	ibkr_CollateralizedTransactionsTableTextBlock
Namespace Prefix:	ibkr_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	ibkr_DisclosureCollateralizedTransactionsAbstract
Namespace Prefix:	ibkr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of financial instruments held by the entity for its own account for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions. Description may include equity, fixed income, debt or other securities.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729

+ Details

Name:	us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration