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EARNINGS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Earnings Per Share Computation | The following table summarizes the computation of basic and diluted earnings per share:
| (In Millions, Except Per Share Amounts)
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
Income from continuing operations | $ | 1,039.9 |  |  | $ | 360.6 |  |  | $ | 122.6 |
Loss (income) from continuing operations attributable to noncontrolling interest | — |  |  | 3.9 |  |  | (25.2 | )
Net income from continuing operations attributable to Cliffs shareholders | $ | 1,039.9 |  |  | $ | 364.5 |  |  | $ | 97.4 |
Income from discontinued operations, net of tax | 88.2 |  |  | 2.5 |  |  | 76.7 |
Net income attributable to Cliffs shareholders | $ | 1,128.1 |  |  | $ | 367.0 |  |  | $ | 174.1 |
Weighted average number of shares: |  |  |  |  |
Basic | 297.2 |  |  | 288.4 |  |  | 197.7 |
$316.25 million 1.50% 2025 Convertible Senior Notes | 3.4 |  |  | — |  |  | — |
Employee stock plans | 3.5 |  |  | 4.6 |  |  | 2.4 |
Diluted | 304.1 |  |  | 293.0 |  |  | 200.1 |
Earnings per common share attributable to Cliffs common shareholders - basic: |  |  |  |  |
Continuing operations | $ | 3.50 |  |  | $ | 1.27 |  |  | $ | 0.49 |
Discontinued operations | 0.30 |  |  | 0.01 |  |  | 0.39 |
| $ | 3.80 |  |  | $ | 1.28 |  |  | $ | 0.88 |
Earnings per common share attributable to Cliffs common shareholders - diluted: |  |  |  |  |
Continuing operations | $ | 3.42 |  |  | $ | 1.25 |  |  | $ | 0.49 |
Discontinued operations | 0.29 |  |  | 0.01 |  |  | 0.38 |
| $ | 3.71 |  |  | $ | 1.26 |  |  | $ | 0.87 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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