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Shares Used in Computing Net Income Per Share | 6 Months Ended
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Jun. 30, 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 June 30, |  | Six Months Ended June 30,
(In millions) | 2019 |  | 2018 |  | 2019 |  | 2018
Weighted-average common shares outstanding used for the calculation of net income per share – basic | 392.5 |  |  | 408.4 |  |  | 392.1 |  |  | 410.7 |
Common stock equivalents | 7.1 |  |  | 8.0 |  |  | 7.3 |  |  | 8.3 |
Weighted-average common shares outstanding used for the calculation of net income per share – diluted | 399.6 |  |  | 416.4 |  |  | 399.4 |  |  | 419.0 |
For the three months ended June 30, 2019 and 2018, stock options for 1.2 million and 1.3 million shares, respectively, were excluded from the calculation of diluted weighted-average outstanding shares because their impact was anti-dilutive. For both the six months ended June 30, 2019 and 2018, stock options for 1.0 million shares 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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