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Equity And Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2021

Equity And Earnings Per Share [Abstract]

IBG LLC Ownership of Member Interests

		IBG, Inc.		Holdings		Total
Ownership %		22.0%		78.0%		100.0%
Membership interests		92,091,373		325,960,034		418,051,407

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 June 30,						Six Months Ended June 30,
		2021			2020			2021			2020
		(in millions, except share or per share amounts)
Basic earnings per share
Net income available for common stockholders		$	92		$	32		$	199		$	78
Weighted average shares of common stock outstanding
Class A			91,365,134			77,357,509			91,078,768			77,054,288
Class B			100			100			100			100
			91,365,234			77,357,609			91,078,868			77,054,388
Basic earnings per share		$	1.01		$	0.41		$	2.19		$	1.01

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 June 30,						Six Months Ended June 30,
		2021			2020			2021			2020
		(in millions, except share or per share amounts)
Diluted earnings per share
Net income available for common stockholders		$	92		$	32		$	199		$	78
Weighted average shares of common stock outstanding
Class A
Issued and outstanding			91,365,134			77,357,509			91,078,768			77,054,288
Potentially dilutive common shares
Issuable pursuant to employee stock incentive plans			833,935			673,853			905,378			745,575
Class B			100			100			100			100
			92,199,169			78,031,462			91,984,246			77,799,963
Diluted earnings per share		$	1.00		$	0.40		$	2.17		$	1.00

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- Definition

Tabular disclosure of the ownership of member interests. [Table Text Block]

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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://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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