Net Income Per Common Share

3 Months Ended

Mar. 31, 2017

Basic earnings per share are computed based on the weighted average number of common shares outstanding. Diluted earnings per share are computed based on the weighted average number of common and dilutive potential common shares outstanding using the treasury stock method. The table shows calculations for basic and diluted earnings per share:



(In millions except per share data)	Three months ended March 31,
(In millions except per share data)	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

The sources of dilution of our common shares are certain equity-based awards. See our 2016 Annual Report on Form 10-K, Item 8, Note 17, Share-Based Associate Compensation Plans, Page 160, for information about equity-based awards. The above table shows the number of anti-dilutive share-based awards for the three months ended March 31, 2017 and 2016. We did not include these share-based awards in the computation of net income per common share (diluted) because their exercise would have anti-dilutive effects.