XML 90 R73.htm IDEA: XBRL DOCUMENT
v3.22.4

Summary of Significant Accounting Policies - Additional Information (Details) | 12 Months Ended
--- | ---
Dec. 31, 2022 shares
PSUs or RSUs |
Disclosure of detailed information about intangible assets [line Items] |
Settlement period for share units | 3 years
DSUs |
Disclosure of detailed information about intangible assets [line Items] |
Number of deferred share units equal to common shares | 1
Bottom of range | Client Relationships |
Disclosure of detailed information about intangible assets [line Items] |
Estimated lives | 10 years
Bottom of range | Contract backlog and finite trademarks |
Disclosure of detailed information about intangible assets [line Items] |
Estimated lives | 1 year
Top of range | Client Relationships |
Disclosure of detailed information about intangible assets [line Items] |
Estimated lives | 15 years
Top of range | Contract backlog and finite trademarks |
Disclosure of detailed information about intangible assets [line Items] |
Estimated lives | 3 years

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfIntangibleAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The useful life, measured as period of time, used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2022-03-24 -Paragraph 118 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2022-en-r&anchor=para_118_a&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum term of options granted for share-based payment arrangement + References No definition available. + Details
Name: | stn_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement
Namespace Prefix: | stn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Other Equity Instruments Granted In Share-Based Payment Arrangement Per Common Share + References No definition available. + Details
Name: | stn_NumberOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangementPerCommonShare
Namespace Prefix: | stn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=stn_PerformanceShareUnitsPSUsOrRestrictedShareUnitsRSUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=stn_DeferredShareUnitsDSUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=ifrs-full_CustomerrelatedIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=stn_ContractBacklogAndFiniteTrademarksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |