Legal Matters (Details)	12 Months Ended
Mar. 30, 2013 item defendant
Legal Matters [Abstract]
Number of U.S.Ethernet Innovations lawsuit co-defendants	2
Number of patents allegedly infringed upon	4

Number of another entity's patents that the entity has allegedly infringed.

No definition available.

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Namespace Prefix:	crus_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration