Description of Business, Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

The following table identifies the activity relating to capitalized software:


	Internal-use Software									External-use Software
In millions	2012			2011			2010			2012			2011			2010
Beginning balance at January 1	$	11		$	11		$	12		$	129		$	105		$	90
Capitalized		6			5			5			75			63			44
Amortization		(5	)		(5	)		(6	)		(43	)		(39	)		(29	)

Ending balance at December 31	$	12		$	11		$	11		$	161		$	129		$	105

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


	For the year ended December 31
In millions, except earnings per share	2012		2011		2010
Net income available for common stockholders	$	419	$	353	$	301

Weighted average outstanding shares of common stock		168.2		168.1		167.4
Dilutive effect of employee stock options and restricted stock		3.5		3.8		3.0

Common stock and common stock equivalents		171.7		171.9		170.4

Earnings per share:
Basic	$	2.49	$	2.10	$	1.80
Diluted	$	2.44	$	2.05	$	1.77