Net Income Per Common Share (Tables)

12 Months Ended

Dec. 31, 2012

Net Income Per Common Share [Abstract]

Calculations For Basic And Diluted Earnings Per Share

(In millions except share data in thousands)			Years ended December 31,
			2012			2011			2010
Numerator:
Net income—basic and diluted	$		421	$		164	$		375
Denominator:
Weighted-average common shares outstanding		162,504			162,667			162,778
Effect of stock-based awards:
Nonvested shares		684			509			484
Stock options		473			83			12
Adjusted diluted weighted-average shares		163,661			163,259			163,274
Earnings per share:
Basic	$		2.59	$		1.01	$		2.30
Diluted			2.57			1.01			2.30
Number of anti-dilutive stock-based awards		5,938			7,758			9,538