Noncash Investing Activities - Additional Information (Detail) - USD ($)	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Noncash investing activities, payables incurred for property, plant and equipment expenditures, unpaid	$ 44,833,000	$ 29,154,000

Noncash or part noncash investing activities payables incurred for property, plant and equipment expenditures unpaid.

No definition available.

Name:	scl_NoncashOrPartNoncashInvestingActivitiesPayablesIncurredForPropertyPlantAndEquipmentExpendituresUnpaid
Namespace Prefix:	scl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration