XML 105 R77.htm IDEA: XBRL DOCUMENT v3.8.0.1

Basis of Preparation - Additional Information (Detail) CAD in Millions	12 Months Ended
	Dec. 31, 2017 CAD
Accounting estimates, useful lives or depreciation rates, property, plant and equipment[member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about property, plant and equipment [line items]
Decrease in depreciation of property and equipment	CAD (2.5)

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

X

- Definition

The increase (decrease) in an accounting estimate that has an effect in the current period or is expected to have an effect in future periods.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 8
-IssueDate 2017-01-01
-Paragraph 39
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=8&date=2017-03-01&anchor=para_39&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_IncreaseDecreaseInAccountingEstimate
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_AccountingEstimatesAxis=stn_AccountingEstimatesUsefulLivesOrDepreciationRatesPropertyPlantAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_AccumulatedDepreciationAndAmortisationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: