XML 134 R106.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Other Financial Assets - Additional Information (Detail) - CAD CAD in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure of investments held for self insured liabilities maturity of bond portfolio at fair value [line items] |  |
Changes in provisions and indemnification assets | CAD 0.2 | CAD 1.2
Bottom of range [member] |  |
Disclosure of investments held for self insured liabilities maturity of bond portfolio at fair value [line items] |  |
Bonds interest rate | 0.75% | 0.88%
Top of range [member] |  |
Disclosure of investments held for self insured liabilities maturity of bond portfolio at fair value [line items] |  |
Bonds interest rate | 5.15% | 4.88%

X
- Definition Bonds interest rate percentage. + References No definition available. + Details
Name: | stn_BondsInterestRatePercentage
Namespace Prefix: | stn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of investments held for self insured liabilities maturity of bond portfolio at fair value. + References No definition available. + Details
Name: | stn_DisclosureOfInvestmentsHeldForSelfInsuredLiabilitiesMaturityOfBondPortfolioAtFairValueLineItems
Namespace Prefix: | stn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase in provisions and indemnification assets. + References No definition available. + Details
Name: | stn_IncreaseInProvisionsAndIndemnificationAssets
Namespace Prefix: | stn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
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: |