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Shares Used in Computing Net Income Per Share | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Shares Used in Computing Net Income Per Share | Shares Used in Computing Net Income Per Share The computation of shares used in calculating basic and diluted net income per common share is as follows:
| Three Months Ended March 31,
(In millions) | 2019 |  | 2018
Weighted-average common shares outstanding used for the calculation of net income per share – basic | 391.7 |  |  | 413.1 |
Common stock equivalents | 7.4 |  |  | 8.5 |
Weighted-average common shares outstanding used for the calculation of net income per share – diluted | 399.1 |  |  | 421.6 |
For the three months ended March 31, 2019 and 2018, stock options for 1.4 million and 0.7 million shares, respectively, were excluded from the calculation of diluted weighted-average outstanding shares because their impact was anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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