Net Income Per Common Share (Tables)

6 Months Ended

Jun. 30, 2015

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)	Three months ended June 30,				Six months ended June 30,
	2015		2014		2015		2014
Numerator:
Net income—basic and diluted	$	176	$	84	$	304	$	175
Denominator:
Basic weighted-average common shares   outstanding	164.1		163.5		164.1		163.5
Effect of stock-based awards:
Stock options	0.9		1.0		0.9		1.0
Nonvested shares	0.5		0.6		0.5		0.6
Diluted weighted-average shares	165.5		165.1		165.5		165.1
Earnings per share:
Basic	$	1.07	$	0.51	$	1.85	$	1.07
Diluted	1.06		0.51		1.84		1.06
Number of anti-dilutive share-based awards	0.7		0.7		0.7		0.7