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Cash Flow Information - Net Cash Flows from Operating Activities (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash Flow Statement [Abstract]
Income taxes paid, net of recoveries	$ (91.2)	$ (89.0)
Interest paid, net of receipts	$ (61.1)	$ (36.4)

X

- Definition

The cash outflow for income taxes paid, classified as operating activities.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2022-03-24
-Paragraph 35
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35&doctype=Standard
-URIDate 2022-03-24

+ Details

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Period Type:	duration

X

- Definition

The cash outflow for interest paid, classified as operating activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2022-03-24
-Paragraph 31
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_31&doctype=Standard
-URIDate 2022-03-24

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Balance Type:	credit
Period Type:	duration

X

- Definition

Cash Flow Statement

+ References

No definition available.

+ Details

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Namespace Prefix:	stn_
Data Type:	xbrli:stringItemType
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