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EXPENSES (Details 1) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Finance costs |  |
Interest on senior unsecured notes | $ 53.2 | $ 54.4
Interest on Credit Facility | 9.0 | 5.9
Accretion expense on decommissioning obligations (Note 17) | 2.0 | 1.0
Gain on modification of long-term debt | 0.0 | (3.3)
Other finance costs | 4.8 | 6.1
Interest expense | 69.0 | 64.1
Less: amounts included in cost of qualifying assets | 0.0 | (51.3)
Total finance costs | 69.0 | 12.8
Finance income |  |
Interest income | $ 1.5 | $ 1.1

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- Definition The amount of income associated with interest and other financing activities of the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard -URIDate 2018-03-16 + Details
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