Year ended May 31,

In millions, except per share amounts

2017

2016

2015

Basic earnings per share:

Net income

$

$

$

Weighted-average common shares outstanding

Basic earnings per share

$

$

$

Diluted earnings per share:

Net income

$

$

$

Weighted-average common shares outstanding

Dilutive effect of common share equivalents

Weighted-average common shares outstanding, assuming dilution

Diluted earnings per share

$

$

$

Weighted-average anti-dilutive common share equivalents