Net Income Per Common Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Calculations For Basic And Diluted Earnings Per Share

The table shows calculations for basic and diluted earnings per share:

(In millions except per share data)	Years ended December 31,
	2013		2012		2011
Numerator:
Net income—basic and diluted	$	517	$	421	$	164
Denominator:
Basic weighted-average common shares outstanding	163.5		162.5		162.7
Effect of stock-based awards:
Stock options	1.2		0.5		0.1
Nonvested shares	0.7		0.7		0.5
Adjusted diluted weighted-average shares	165.4		163.7		163.3
Earnings per share:
Basic	$	3.16	$	2.59	$	1.01
Diluted	3.12		2.57		1.01
Number of anti-dilutive stock-based awards	0.4		5.9		7.8