Equity And Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2016

Equity And Earnings Per Share [Abstract]



	IBG, Inc.	Holdings	Total
Ownership %	16.2%	83.8%	100.0%
Membership interests	66,386,915	343,040,504	409,427,419

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,
	2016		2015		2016		2015

	(in millions, except for shares or per share amounts)
Basic earnings per share
Net income available for common stockholders	$	27	$	23	$	60	$	10
Weighted average shares of common stock outstanding
Class A		64,967,264		59,481,678		64,476,321		58,980,248
Class B		100		100		100		100
		64,967,364		59,481,778		64,476,421		58,980,348
Basic earnings per share	$	0.41	$	0.38	$	0.93	$	0.17

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,
	2016		2015		2016		2015

	(in millions, except for shares or per share amounts)
Diluted earnings per share
Net income available for common stockholders	$	27	$	23	$	60	$	10
Weighted average shares of common stock outstanding
Class A
Issued and outstanding		64,967,264		59,481,678		64,476,321		58,980,248
Potentially dilutive common shares
Issuable pursuant to employee stock incentive plans		1,503,549		1,557,148		1,386,987		1,456,566
Class B		100		100		100		100
		66,470,913		61,038,926		65,863,408		60,436,914
Diluted earnings per share	$	0.40	$	0.37	$	0.91	$	0.17