Net Income Per Common Share (Tables)

3 Months Ended

Mar. 31, 2017

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 March 31,
	2017		2016
Numerator:
Net income—basic and diluted	$	201	$	188
Denominator:
Basic weighted-average common shares outstanding	164.6		164.2
Effect of share-based awards:
Stock options	1.1		1.0
Nonvested shares	0.8		0.8
Diluted weighted-average shares	166.5		166.0
Earnings per share:
Basic	$	1.22	$	1.14
Diluted	1.21		1.13
Number of anti-dilutive share-based awards	0.7		0.4