XML 60 R45.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Marketable Securities (Narrative) (Details) (USD $) | Mar. 29, 2014 security | Mar. 30, 2013 security
--- | --- | ---
Marketable Securities [Abstract] |  |
Gross Unrealized Losses | $ (253,000) | $ (164,000)
Amortized cost on available for sale securities held at gross unrealized loss | $ 207,800,000 | $ 124,100,000
Number of securities | 74 | 43

X
- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References No definition available. + Details
Name: | crus_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | crus_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of available for sale securities in an unrealized loss position. + References No definition available. + Details
Name: | crus_AvailableForSaleSecuritiesAmortizedCostOnGrossUnrealizedLosses
Namespace Prefix: | crus_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_MarketableSecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration