Net Income Per Common Share (Tables)

12 Months Ended

Dec. 31, 2014

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,
	2014		2013		2012
Numerator:
Net income—basic and diluted	$	525	$	517	$	421
Denominator:
Basic weighted-average common shares outstanding	163.5		163.5		162.5
Effect of stock-based awards:
Stock options	1.0		1.2		0.5
Nonvested shares	0.6		0.7		0.7
Diluted weighted-average shares	165.1		165.4		163.7
Earnings per share:
Basic	$	3.21	$	3.16	$	2.59
Diluted	3.18		3.12		2.57
Number of anti-dilutive stock-based awards	0.7		0.4		5.9