Leases - Additional Information (Detail)	Jun. 30, 2022 USD ($)
Leases [Abstract]
Leases not yet commenced	$ 0

Operating lease liability not yet commenced value.

No definition available.

Name:	scl_OperatingLeaseLiabilityNotYetCommencedValue
Namespace Prefix:	scl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant