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v3.20.4

Subsequent Events - Additional Information (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
Feb. 02, 2021 USD ($) | Jan. 29, 2021 USD ($) Site | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Subsequent Event [Line Items] |  |  |  |  |
Purchase price |  |  | $ 13,519,000 | $ 9,000,000 | $ 22,852,000
Subsequent Event [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Asset purchase agreement date |  | Jan. 29, 2021 |  |  |
Number of manufacturing site | Site |  | 2 |  |  |
Purchase price |  | $ 165,000,000 |  |  |
Subsequent Event [Member] | Fermentation Plant Acquisition [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Purchase price | $ 3,500,000 |  |  |  |

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- Definition Number of manufacturing sites. + References No definition available. + Details
Name: | scl_NumberOfManufacturingSites
Namespace Prefix: | scl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Date when the business acquisition agreement was executed, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=scl_FermentationPlantAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |