Name:	slab_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesToBeDeductedFromSharesAvailableForIssuanceForEachShareGranted
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Data Type:	xbrli:sharesItemType
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Represents the cash consideration based upon achievement of specified levels of market conditions.

No definition available.

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Namespace Prefix:	slab_
Data Type:	xbrli:monetaryItemType
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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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.

No definition available.

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Gross number of share options (or share units) granted during the period.

No definition available.

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Data Type:	xbrli:sharesItemType
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Purchase price of common stock expressed as a percentage of its fair value.

No definition available.

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Data Type:	num:percentItemType
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Name:	srt_RangeAxis=srt_MaximumMember
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Data Type:	na
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Name:	us-gaap_AwardTypeAxis=slab_MarketStockUnitsMember
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