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Earnings Per Share and Equity (Tables) | 12 Months Ended
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Dec. 31, 2016
Equity [Abstract] |
Schedule of Net Income Per Share | Calculations of net income per common share attributable to ON Semiconductor Corporation are as follows (in millions, except per share data):
|  | For the years ended December 31,
|  | 2016 |  | 2015 |  | 2014
Net income attributable to ON Semiconductor Corporation |  | $ | 182.1 |  |  | $ | 206.2 |  |  | $ | 189.7 |
Basic weighted average common shares outstanding |  | 415.2 |  |  | 421.2 |  |  | 439.5 |
Add: Incremental shares for: |  |  |  |  |  |
Dilutive effect of share-based awards |  | 3.8 |  |  | 4.6 |  |  | 4.0 |
Dilutive effect of convertible notes |  | 1.0 |  |  | 2.0 |  |  | — |
Diluted weighted average common shares outstanding |  | 420.0 |  |  | 427.8 |  |  | 443.5 |
Net income per common share attributable to ON Semiconductor Corporation: |  |  |  |  |  |
Basic |  | $ | 0.44 |  |  | $ | 0.49 |  |  | $ | 0.43 |
Diluted |  | $ | 0.43 |  |  | $ | 0.48 |  |  | $ | 0.43 |
Schedule of Share Repurchase Program | Information relating to the Company's share repurchase programs is as follows (in millions, except per share data):
|  | For the years ended December 31,
|  | 2016 |  | 2015(5) |  | 2014
Number of repurchased shares (1) |  | — |  |  | 30.4 |  |  | 13.9 |
Beginning accrued share repurchases (2) |  | $ | — |  |  | $ | — |  |  | $ | 0.6 |
Aggregate purchase price |  | — |  |  | 347.8 |  | 121.0
Fees, commissions and other expenses |  | — |  |  | 0.4 |  | 0.2
Less: ending accrued share repurchases (3) |  | — |  |  | — |  |  | — |
Total cash used for share repurchases |  | $ | — |  |  | $ | 348.2 |  |  | $ | 121.8 |
Weighted-average purchase price per share (4) |  | $ | — |  |  | $ | 11.46 |  |  | $ | 8.71 |
Available for future purchases at period end |  | $ | 628.2 |  |  | $ | 628.2 |  |  | $ | 976.0 |
_______________________ (1) None of these shares had been reissued or retired as of December 31, 2016, but may be reissued or retired by the Company at a later date. (2) Represents unpaid amounts recorded in accrued expenses on the Company's Consolidated Balance Sheet as of the beginning of the period. (3) Represents unpaid amounts recorded in accrued expenses on the Company's Consolidated Balance Sheet as of the end of the period. (4) Exclusive of fees, commissions and other expenses. (5) Includes 5.4 million shares, totaling $70.0 million, repurchased concurrently with the issuance of the 1.00% Notes. See Note 8: ''Long-Term Debt'' for information with respect to the Company's long-term debt.

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