Per Share Data

Basic net income per share attributable to the Company is calculated by dividing the after-tax income attributable to the Company by the weighted average number of outstanding shares of the Company’s common stock.

Diluted net income per share attributable to the Company is calculated by dividing the after-tax income attributable to the Company by the weighted average number of outstanding shares of the Company’s common stock, which have been adjusted for the dilutive effect of potentially issuable common shares.



Basic and Diluted EPS Calculation	Three Months Ended March 31,
(In millions, except per share amounts)	2018		2017
Net income before non-controlling interests	$	696	$	578
Less: Net income attributable to non-controlling interests	6		9
Net income attributable to the Company	$	690	$	569
Basic weighted average common shares outstanding	508		515
Dilutive effect of potentially issuable common shares	6		7
Diluted weighted average common shares outstanding	514		522
Average stock price used to calculate common stock equivalents	$	82.83	$	71.32

There were 10.6 million and 12.8 million stock options outstanding as of March 31, 2018 and 2017, respectively.