v2.3.0.11

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings Per Share

Components of Basic and Diluted Earnings Per Share

		Three Months Ended June 30,								Six Months Ended June 30,
In millions, except per share amounts		2011				2010				2011				2010
Net income available for common stockholders		$	103			$	74			$	168			$	141
Weighted average outstanding shares of common stock			168.7				167.0				168.5				167.4
Dilutive effect of employee stock options and restricted stock			3.7				2.8				3.6				2.8
Common stock and common stock equivalents			172.4				169.8				172.1				170.2
Earnings per share:
Basic		$	0.61			$	0.44			$	1.00			$	0.84
Diluted		$	0.60			$	0.44			$	0.98			$	0.83

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Tabular disclosure of an entity's basic and diluted earnings per share calculations.

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