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EARNINGS PER SHARE | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
EARNINGS PER SHARE | EARNINGS PER SHARE Basic earnings per share is computed by dividing net income by the weighted-average common shares outstanding during a period. Diluted earnings per share is computed based on the weighted-average common shares outstanding plus the effect of dilutive potential common shares outstanding during the period calculated using the treasury stock method. Dilutive potential common shares include employee equity share options, nonvested shares, and similar equity instruments granted by the Company. Potential common share equivalents have been excluded where their inclusion would be anti-dilutive. The table below presents the computation of basic and diluted earnings per share (in millions, except for per share information):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Basic: |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 282.7 |  |  | $ | 186.1 |  |  | $ | 489.3 |  |  | $ | 416.3 |
Weighted-average shares outstanding | 209.5 |  |  | 210.5 |  |  | 209.8 |  |  | 210.8 |
Basic earnings per share | $ | 1.35 |  |  | $ | 0.88 |  |  | $ | 2.33 |  |  | $ | 1.97 |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 282.7 |  |  | $ | 186.1 |  |  | $ | 489.3 |  |  | $ | 416.3 |
Weighted-average shares outstanding | 209.5 |  |  | 210.5 |  |  | 209.8 |  |  | 210.8 |
Dilutive effect of stock plans | 4.5 |  |  | 5.2 |  |  | 4.7 |  |  | 5.3 |
Dilutive weighted-average shares outstanding | 214.0 |  |  | 215.7 |  |  | 214.5 |  |  | 216.1 |
Diluted earnings per share | $ | 1.32 |  |  | $ | 0.86 |  |  | $ | 2.28 |  |  | $ | 1.93 |
Stock options, restricted stock units, and market-based restricted stock units to purchase 1.2 million and 2.2 million shares for the three months ended June 30, 2018 and 2017, respectively, and 1.2 million and 1.7 million shares for the six months ended June 30, 2018 and 2017, respectively, were outstanding, but were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive. Additionally, 0.3 million shares that would have been received if the ASR agreement discussed in Note 10 was settled as of June 30, 2018 were not included in the computation of diluted earnings per share because the effect would have been 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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