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Debt and Credit Facility (Tables) | 12 Months Ended
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Dec. 31, 2016
Debt Disclosure [Abstract] |
Schedule of Interest Incurred on Convertible Debt | The following table provides additional information regarding the Convertible Notes (in millions of dollars):
| Year Ended December 31,
| 2015 |  | 2014
Contractual coupon interest | $ | 2.0 |  |  | $ | 7.9 |
Amortization of discount | 2.4 |  |  | 9.1 |
Amortization of debt issuance costs | 0.3 |  |  | 1.1 |
Total interest expense 1 | $ | 4.7 |  |  | $ | 18.1 |
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1. | A portion of the interest relating to the Convertible Notes was capitalized as construction in progress.

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- Definition Tabular disclosure of borrowings which can be exchanged for a specified number of another security at the option of the issuer or the holder. Disclosures include, but are not limited to, principal amount, amortized premium or discount, and amount of liability and equity components. + References No definition available. + Details
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- References No definition available. + Details
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