Financial Instruments and Risk Management - Credit and Liquidity Risk (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Financial Instruments [Abstract]
Percent of gross accounts receivable over 90 days past due (less than in 2019)	2.00%	1.00%
Allowance for doubtful accounts	$ 4.2	$ 5.3

The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2019-03-27

Name:	ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant