Basic and Diluted Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Basic and Diluted Earnings Per Share [Abstract]

Calculation of Basic and Diluted Earnings (Loss) Per Share

The following table summarizes the calculation of basic and diluted earnings per share:

	Three Months Ended March 31,
	2012		2011
(millions, except per share amounts)
Net Income	$	263	$	14
Weighted Average Number of Shares Outstanding, Basic		177		176
Incremental Shares From Assumed Conversion of Dilutive Stock Options and Restricted Stock		3		2
Weighted Average Number of Shares Outstanding, Diluted		180		178
Earnings Per Share, Basic	$	1.48	$	0.08
Earnings Per Share, Diluted		1.47		0.08
Number of antidilutive stock options, shares of restricted stock and shares of common stock in rabbi trust excluded from calculation above		2		2