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Equity And Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2020

Equity And Earnings Per Share [Abstract]

IBG LLC Ownership of Member Interests

		IBG, Inc.		Holdings		Total
	Ownership %	19.0%		81.0%		100.0%
	Membership interests	79,057,622		337,670,642		416,728,264

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,
		2020			2019			2020			2019
		(in millions, except share or per share amounts)
Basic earnings per share
Net income available for common stockholders		$	46		$	36		$	124		$	117
Weighted average shares of common stock outstanding
Class A			78,509,525			76,742,689			77,542,908			75,909,980
Class B			100			100			100			100
			78,509,625			76,742,789			77,543,008			75,910,080
Basic earnings per share		$	0.59		$	0.46		$	1.60		$	1.54

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,
		2020			2019			2020			2019
		(in millions, except share or per share amounts)
Diluted earnings per share
Net income available for common stockholders		$	46		$	36		$	124		$	117
Weighted average shares of common stock outstanding
Class A
Issued and outstanding			78,509,525			76,742,689			77,542,908			75,909,980
Potentially dilutive common shares
Issuable pursuant to employee stock incentive plans			610,923			606,187			700,691			736,407
Class B			100			100			100			100
			79,120,548			77,348,976			78,243,699			76,646,487
Diluted earnings per share		$	0.58		$	0.45		$	1.58		$	1.52

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- Definition

Tabular disclosure of the ownership of IBG LLC member interests.

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- 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

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