Net Earnings per Share

The basic weighted average shares and common stock equivalents for the three and six months ended June 30, 2017 and 2016 are computed using the treasury stock method.

The following table summarizes the earnings per share attributable to FIS common stockholders for the three and six months ended June 30, 2017 and 2016 (in millions, except per share amounts):



	Three months ended June 30,				Six months ended June 30,
	2017		2016		2017		2016
Net earnings from continuing operations attributable to FIS	$	132	$	120	$	270	$	175
Net earnings (loss) from discontinued operations attributable to FIS	—		1		—		1
Net earnings attributable to FIS common stockholders	$	132	$	121	$	270	$	176
Weighted average shares outstanding — basic	330		325		329		325
Plus: Common stock equivalent shares	4		4		5		3
Weighted average shares outstanding — diluted	334		329		334		328
Net earnings per share — basic from continuing operations attributable to FIS common stockholders	$	0.40	$	0.37	$	0.82	$	0.54
Net earnings (loss) per share — basic from discontinued operations attributable to FIS common stockholders	—		—		—		—
Net earnings per share — basic attributable to FIS common stockholders	$	0.40	$	0.37	$	0.82	$	0.54
Net earnings per share — diluted from continuing operations attributable to FIS common stockholders	$	0.40	$	0.36	$	0.81	$	0.53
Net earnings (loss) per share — diluted from discontinued operations attributable to FIS common stockholders	—		—		—		—
Net earnings per share — diluted attributable to FIS common stockholders	$	0.40	$	0.37	$	0.81	$	0.54

Options to purchase approximately 4 million and 7 million shares of our common stock for the three months and 4 million and 7 million for the six months ended June 30, 2017 and 2016, respectively, were not included in the computation of diluted earnings per share because they were anti-dilutive.

On July 20, 2017 our Board of Directors approved a plan authorizing repurchases of up to $4 billion of our outstanding common stock in the open market at prevailing market prices or in privately negotiated transactions through December 31, 2020. This share repurchase authorization replaced any existing share repurchase authorization.