Financial Instruments and Risk Management (Fuel Option Contracts) (Details) - USD ($) $ in Millions		12 Months Ended
Jan. 07, 2019	Dec. 31, 2019
Disclosure of detailed information about hedged items [line items]
Gains (losses) on change in fair value of derivatives	$ 3.9
Fuel Options [Member] \| Commodity price risk [member]
Disclosure of detailed information about hedged items [line items]
Gains (losses) on change in fair value of derivatives		$ (0.5)

The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 85
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_85&doctype=Standard
-URIDate 2019-03-27

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Period Type:	duration