Equity And Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2017

Equity And Earnings Per Share [Abstract]



	IBG, Inc.	Holdings	Total
Ownership %	17.1%	82.9%	100.0%
Membership interests	70,254,969	341,444,304	411,699,273

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,
	2017		2016		2017		2016

	(in millions, except share or per share amounts)
Basic earnings per share
Net income available for common stockholders	$	23	$	27	$	47	$	60
Weighted average shares of common stock outstanding
Class A		69,087,753		64,967,264		68,539,426		64,476,321
Class B		100		100		100		100
		69,087,853		64,967,364		68,539,526		64,476,421
Basic earnings per share	$	0.33	$	0.41	$	0.68	$	0.93

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,
	2017		2016		2017		2016

	(in millions, except share or per share amounts)
Diluted earnings per share
Net income available for common stockholders	$	23	$	27	$	47	$	60
Weighted average shares of common stock outstanding
Class A
Issued and outstanding		69,087,753		64,967,264		68,539,426		64,476,321
Potentially dilutive common shares
Issuable pursuant to employee stock incentive plans		975,574		1,503,549		1,074,041		1,386,987
Class B		100		100		100		100
		70,063,427		66,470,913		69,613,567		65,863,408
Diluted earnings per share	$	0.32	$	0.40	$	0.67	$	0.91