Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:



	Year Ended December 31,
	2018		2017		2016
Numerator:	(in millions, except share and per share amounts)
Net income attributable to common shareholders	$	458	$	729	$	106
Denominator:
Weighted-average common shares outstanding for basic earnings per share	165,349,471		166,364,299		165,182,290
Weighted-average effect of dilutive securities:
Employee equity awards⁽¹⁾	1,988,610		2,861,892		3,258,136
Contingent issuance of common stock	353,218		358,840		360,571
Weighted-average common shares outstanding for diluted earnings per share	167,691,299		169,585,031		168,800,997
Basic and diluted earnings per share:
Basic earnings per share	$	2.77	$	4.38	$	0.64
Diluted earnings per share	$	2.73	$	4.30	$	0.63

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⁽¹⁾	PSUs, which are considered contingently issuable, are included in the computation of dilutive earnings per share on a weighted average basis when management determines the related performance criteria are met.

There were no securities that were antidilutive for the year ended December 31, 2018. Securities that were not included in the computation of diluted earnings per share because their effect was antidilutive totaled 267,465 for the year ended December 31, 2017 and 264,134 for the year ended December 31, 2016.