XML 22 R25.htm IDEA: XBRL DOCUMENT v3.19.3

Equity And Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2019

Equity And Earnings Per Share [Abstract]

IBG LLC Ownership of Member Interests

		IBG, Inc.		Holdings		Total
	Ownership %	18.5%		81.5%		100.0%
	Membership interests	76,748,855		338,670,642		415,419,497

Earnings Per Share Basic And Diluted

Basic earnings per share is calculated utilizing net income available for common stockholders divided by the weighted average number of shares of Class A and Class B common stock outstanding for that period.

		Three Months Ended September 30,						Nine Months Ended September 30,
		2019			2018			2019			2018
		(in millions, except share or per share amounts)
Basic earnings per share
Net income available for common stockholders		$	36		$	39		$	117		$	126
Weighted average shares of common stock outstanding
Class A			76,742,689			74,649,369			75,909,980			72,878,907
Class B			100			100			100			100
			76,742,789			74,649,469			75,910,080			72,879,007
Basic earnings per share		$	0.46		$	0.52		$	1.54		$	1.73

Diluted earnings per share are calculated utilizing the Company’s basic net income available for common stockholders divided by diluted weighted average shares outstanding with no adjustments to net income available to common stockholders for potentially dilutive common shares.

		Three Months Ended September 30,						Nine Months Ended September 30,
		2019			2018			2019			2018
		(in millions, except share or per share amounts)
Diluted earnings per share
Net income available for common stockholders		$	36		$	39		$	117		$	126
Weighted average shares of common stock outstanding
Class A
Issued and outstanding			76,742,689			74,649,369			75,909,980			72,878,907
Potentially dilutive common shares
Issuable pursuant to employee stock incentive plans			606,187			710,620			736,407			866,633
Class B			100			100			100			100
			77,348,976			75,360,089			76,646,487			73,745,640
Diluted earnings per share		$	0.45		$	0.51		$	1.52		$	1.71

X

- Definition

Tabular disclosure of the ownership of IBG LLC member interests.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

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