Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2016

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 September 30,				Nine months ended September 30,
	2016		2015		2016		2015
Numerator:
Net income—basic and diluted	$	180	$	174	$	491	$	478
Denominator:
Basic weighted-average common shares outstanding	164.6		164.0		164.5		164.1
Effect of share-based awards:
Stock options	1.2		1.0		1.1		0.9
Nonvested shares	1.0		0.5		0.9		0.5
Diluted weighted-average shares	166.8		165.5		166.5		165.5
Earnings per share:
Basic	$	1.09	$	1.06	$	2.98	$	2.91
Diluted	1.08		1.05		2.95		2.89
Number of anti-dilutive share-based awards:	—		0.3		0.3		0.7