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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
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 214,661us-gaap_FiniteLivedIntangibleAssetsGross $ 33,656us-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 1,390us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= crus_CoreTechnologyMember
1,390us-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 440us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
440us-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 98,645us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= crus_ExistingTechnologyMember
9,826us-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 72,750us-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 3,037us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksAndTradeNamesMember
1,600us-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 15,381us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
2,400us-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 23,018us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= crus_TechnologyLicensesMember
18,000us-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