Represents the number of nearly identical actions filed against other companies with which a class action complaint against the entity is being coordinated.

Name:	slab_ClassActionComplaintNumberOfCoordinatedCases
Namespace Prefix:	slab
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Balance Type:	na
Period Type:	duration

- Definition

Represents the number of coordinated cases nearly identical to a class action complaint against the entity intended to serve as test, or "focus" cases and for which the decision granting class certification has been vacated.

+ Details

Name:	slab_ClassActionComplaintNumberOfFocusCases
Namespace Prefix:	slab
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of investment banking firms against whom a class action complaint has been filed for violations. These firms served as representatives of the underwriters in connection with the entity's initial public offering of common stock.

+ Details

Name:	slab_ClassActionComplaintNumberOfInvestmentBankingFirms
Namespace Prefix:	slab
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of officers of the entity who are individually named in a class action complaint.

+ Details

Name:	slab_ClassActionComplaintNumberOfOfficers
Namespace Prefix:	slab
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of officers of the entity dismissed without prejudice by a court order in connection with a class action complaint.

+ Details

Name:	slab_ClassActionComplaintNumberOfOfficersDismissed
Namespace Prefix:	slab
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the contingent liability, on a first dollar loss basis, in the event the entity causes the leased property to be sold to a third party and the sale proceeds are less than the entity's purchase option.

+ Details

Name:	slab_OperatingLeasesContingentLiabilityOnSaleToThirdParty
Namespace Prefix:	slab
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the purchase price available to the entity for the purchase of buildings currently under an operating lease agreement.

+ Details

Name:	slab_OperatingLeasesPurchasePriceForBuildings
Namespace Prefix:	slab
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of claims settled and dismissed during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- 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.

+ Details

Name:	us-gaap_OperatingLeasedAssetsLineItems
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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Jan. 30, 2010 Appeal	Dec. 30, 2006 Case	Oct. 26, 2002 Litigant	Dec. 29, 2001 Litigant Case	Oct. 01, 2011 400 WCC	Oct. 01, 2011 200 WCC
Commitments and Contingencies
Number of officers named in class action complaint				4
Number of investment banking firms in class action complaint				3
Number of coordinated, nearly identical actions filed against other companies				300
Number of officers dismissed by court order			4
Number of cases serving as focus cases		6
Number of appeals dismissed	1
Loss contingency
Purchase option price for buildings (in dollars)					$ 44.3	$ 50.1
Contingent liability on sale of leased property to third party (in dollars)					$ 35.3	$ 40.0