Earnings Per Share Data (Tables)

6 Months Ended

Jun. 30, 2012

The following table reconciles the basic earnings per share computation to the diluted earnings per share computation (in millions, except share and per share amounts):



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2012		2011		2012		2011
Net income available to common stockholders for purposes of computing basic earnings per share	$	120.4	$	70.7	$	195.3	$	133.3
Effect of dividends on conversion of convertible preferred stock	—		—		—		1.4
Net income available to common stockholders for purposes of computing diluted earnings per share	$	120.4	$	70.7	$	195.3	$	134.7
Weighted-average number of shares outstanding (in thousands):
Basic shares	109,689		109,428		109,657		106,858
Effect of dilution	367		382		371		2,918
Diluted shares	110,056		109,810		110,028		109,776
Earnings per share:
Basic earnings per share	$	1.10	$	0.65	$	1.78	$	1.25
Diluted earnings per share	$	1.09	$	0.64	$	1.77	$	1.23

Potentially dilutive shares excluded from the calculation (in thousands):
Stock options excluded as their inclusion would be anti-dilutive	69		97		69		101