Capital Commitments	12 Months Ended
Dec. 31, 2019
Commitments [Abstract]
Capital Commitments	NOTE 23. CAPITAL COMMITMENTS At December 31, 2019, the Corporation had commitments to purchase property, plant and equipment totaling $113 million (2018 – $180 million). Payments of $25 million for these commitments are expected to be made in 2020, $53 million in 2021 and $35 million in 2022.

The disclosure of commitments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 10
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_10_e&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_DisclosureOfCommitmentsExplanatory
Namespace Prefix:	ifrs-full_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration