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Related Party Transactions (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Apr. 01, 2017 | Apr. 02, 2016
Mr. Bock |  |
Related Party Transaction |  |
Lease payments | $ 0.9 | $ 0.8

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- Definition Lease revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue from related parties. + References No definition available. + Details
Name: | slab_LeaseRevenueRelatedParties
Namespace Prefix: | slab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_PresidentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |