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Intangibles, Net (Schedule of Gross Carrying Amount and Amortization of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 28, 2015 | Mar. 29, 2014
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | $ 214,661 us-gaap_FiniteLivedIntangibleAssetsGross | $ 33,656 us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated Amortization | (38,918)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | (21,657)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Core Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 1,390 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_CoreTechnologyMember | 1,390 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_CoreTechnologyMember
Accumulated Amortization | (1,390)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_CoreTechnologyMember | (1,390)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_CoreTechnologyMember
License Agreement [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 440 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LicensingAgreementsMember | 440 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LicensingAgreementsMember
Accumulated Amortization | (440)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LicensingAgreementsMember | (440)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LicensingAgreementsMember
Existing Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 98,645 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_ExistingTechnologyMember | 9,826 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_ExistingTechnologyMember
Accumulated Amortization | (13,596)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_ExistingTechnologyMember | (4,206)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_ExistingTechnologyMember
In-Process Research & Development [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 72,750 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_InProcessResearchDevelopmentMember |
Accumulated Amortization | (3,918)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_InProcessResearchDevelopmentMember |
Trademarks and Tradenames [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 3,037 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember | 1,600 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember
Accumulated Amortization | (1,141)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember | (384)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 15,381 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | 2,400 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Accumulated Amortization | (1,117)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | (120)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Technology Licenses [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 23,018 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_TechnologyLicensesMember | 18,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_TechnologyLicensesMember
Accumulated Amortization | $ (17,316)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_TechnologyLicensesMember | $ (15,117)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = crus_TechnologyLicensesMember

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