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Interest expense | 12 Months Ended
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Dec. 31, 2018
Borrowing costs [abstract] |
Interest expense |
Note 7 | Interest expense
FOR THE YEAR ENDED DECEMBER 31 | 2018 |  | 2017 |
Interest expense on long-term debt | (918 | ) | (898 | )
Interest expense on other debt | (133 | ) | (101 | )
Capitalized interest | 51 |  | 44 |
Total interest expense | (1,000 | ) | (955 | )
Interest expense on long-term debt includes interest on finance leases of $142 million and $145 million for 2018 and 2017, respectively. Capitalized interest was calculated using an average rate of 3.88% and 3.81% for 2018 and 2017, respectively, which represents the weighted average interest rate on our outstanding long-term debt.

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- Definition The disclosure of interest expense. [Refer: Interest expense] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_10_e&doctype=Standard -URIDate 2018-03-16 + Details
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