Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Components of Basic and Diluted Earnings Per Share

The components of basic and diluted earnings per share are as follows:

	Three Months Ended
	March 31,
In millions, except per share amounts	2013		2012
Net income available for common stockholders	$	59	$	91
Weighted average outstanding shares of common stock		165.4		167.9
Dilutive effect of employee stock options and restricted stock		3.1		3.7
Common stock and common stock equivalents		168.5		171.6
Earnings per share:
Basic	$	0.36	$	0.54
Diluted	$	0.35	$	0.53