XML 177 R169.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Events after the Reporting Period - Additional Information (Detail) - CAD ($)		2 Months Ended	12 Months Ended
	Feb. 26, 2020	Feb. 26, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of non-adjusting events after reporting period [Line Items]
Aggregate price of common shares repurchased and cancelled			$ 43,200,000	$ 76,700,000
Dividend transaction [member]
Disclosure of non-adjusting events after reporting period [Line Items]
Dividends payable declared date	Feb. 26, 2020
Dividends payable amount per share	$ 0.155
Dividend payable date	Apr. 15, 2020
Dividends payable record date	Mar. 31, 2020
Events after reporting period [member] | Normal Course Issuer Bid (NCIB) [member]
Disclosure of non-adjusting events after reporting period [Line Items]
Number of Common shares repurchased and cancelled		141,700
Average price of common shares repurchased and cancelled		$ 37.03
Aggregate price of common shares repurchased and cancelled		$ 5.2

X

- Definition

The amount of treasury stock cancelled during the period. [Refer: Treasury shares]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 106
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_106_d&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_CancellationOfTreasuryShares
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount, per share, of dividends proposed or declared before financial statements were authorised for issue but not recognised as distribution to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 137
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_137_a&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Average price of common shares repurchased and cancelled.

+ References

No definition available.

+ Details

Name:	stn_AveragePriceOfCommonSharesRepurchasedAndCancelled
Namespace Prefix:	stn_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Dividend payable date.

+ References

No definition available.

+ Details

Name:	stn_DividendPayableDate
Namespace Prefix:	stn_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Dividends Payable Declared Date

+ References

No definition available.

+ Details

Name:	stn_DividendsPayableDeclaredDate
Namespace Prefix:	stn_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Dividends Payable Record Date

+ References

No definition available.

+ Details

Name:	stn_DividendsPayableRecordDate
Namespace Prefix:	stn_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of common shares repurchased and cancelled.

+ References

No definition available.

+ Details

Name:	stn_NumberOfCommonSharesRepurchasedAndCancelled
Namespace Prefix:	stn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=stn_DividendTransactionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=stn_EventsAfterReportingPeriodMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfOrdinarySharesAxis=stn_NCIBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: