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Subsequent Event - Additional Information (Detail) - Tebras And PBC [Member] - Subsequent Event [Member] - Surfactants [Member] - Brazil [Member] | Jul. 20, 2016 USD ($) Customer t
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Subsequent Event [Line Items] |
Combined entities annual sales | $ | $ 32,000,000
Capacity of production facility purchased in connection with acquisition | t | 25,000
Minimum [Member] |
Subsequent Event [Line Items] |
Number of customers | Customer | 1,200

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- Definition Business combination capacity of production facility acquired. + References No definition available. + Details
Name: | scl_BusinessCombinationCapacityOfProductionFacilityAcquired
Namespace Prefix: | scl_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

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

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- Definition Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod
Namespace Prefix: | us-gaap_
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
Name: | us-gaap_BusinessAcquisitionAxis=scl_TebrasAndPBCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=scl_SurfactantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementGeographicalAxis=country_BR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |