XML 135 R107.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Other Financial Assets - Disclosure of the Bond Portfolio Stated at Fair Value (Detail) - CAD CAD in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Maturity of bond portfolio, stated fair value | CAD 97.7 | CAD 93.0
Within one year [member] |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Maturity of bond portfolio, stated fair value | 5.6 | 18.6
2018 to 2022 [member] |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Maturity of bond portfolio, stated fair value | 73.5 | 64.8
More than five years [member] |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Maturity of bond portfolio, stated fair value | CAD 18.6 | CAD 9.6

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_DisclosureOfMaturityAnalysisForFinancialAssetsHeldForManagingLiquidityRiskLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of other financial assets maturity amount. + References No definition available. + Details
Name: | stn_FairValueOfOtherFinancialAssetsMaturityAmount
Namespace Prefix: | stn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |