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Summary of Significant Accounting Policies (Narrative) (Details) (USD $)
Share data in Thousands, unless otherwise specified
12 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Mar. 30, 2013
Inventory write-down $ 7,200,000us-gaap_InventoryWriteDown    
Depreciation and amortization expense on property, plant and equipment 15,400,000us-gaap_DepreciationAndAmortization 12,100,000us-gaap_DepreciationAndAmortization 10,200,000us-gaap_DepreciationAndAmortization
Impairment of goodwill 0us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss
Advertising expense $ 1,100,000us-gaap_AdvertisingExpense $ 1,400,000us-gaap_AdvertisingExpense $ 1,500,000us-gaap_AdvertisingExpense
Weighted outstanding options excluded from diluted calculation 718us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 833us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 453us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Maximum [Member]      
Intangible assets, useful life 10 years    
Acquired intangible assets, useful life 15 years    
Share-based compensation, vesting period 4 years    
Minimum [Member]      
Intangible assets, useful life 1 year    
Acquired intangible assets, useful life 1 year    
Share-based compensation, vesting period 0 years    
Buildings [Member] | Maximum [Member]      
Estimated useful life 39 years    
Capitalized Software [Member]      
Estimated useful life 3 years    
Furniture, Fixtures, Machinery and Equipment [Member] | Maximum [Member]      
Estimated useful life 10 years    
Furniture, Fixtures, Machinery and Equipment [Member] | Minimum [Member]      
Estimated useful life 3 years    
Capitalized Enterprise Resource Planning Software [Member]      
Estimated useful life 10 years    
Property, Plant and Equipment [Member] | Maximum [Member]      
Estimated useful life 39 years    
Property, Plant and Equipment [Member] | Minimum [Member]      
Estimated useful life 3 years    
Hongfujin Precision [Member] | Accounts Receivable [Member]      
Concentration risk, percentage 26.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= crus_HongfujinPrecisionMember
44.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= crus_HongfujinPrecisionMember
 
Protek [Member] | Accounts Receivable [Member]      
Concentration risk, percentage 15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= crus_ProtekMember
12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= crus_ProtekMember
 
Samsung Electronics [Member] | Accounts Receivable [Member]      
Concentration risk, percentage 22.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= crus_SamsungElectronicsMember
   
Futaihua Industrial [Member] | Accounts Receivable [Member]      
Concentration risk, percentage   14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= crus_FutaihuaIndustrialMember
 
Avnet, Inc. [Member] | Accounts Receivable [Member]      
Concentration risk, percentage   11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= crus_AvnetIncMember
 
Ten Largest Customers [Member]      
Number of customers responsible for sales concentration 10crus_NumberOfCustomersResponsibleForSalesConcentration
/ us-gaap_MajorCustomersAxis
= crus_TenLargestCustomersMember
   
Ten Largest Customers [Member] | Sales [Member]      
Concentration risk, percentage 87.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_MajorCustomersAxis
= crus_TenLargestCustomersMember
88.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_MajorCustomersAxis
= crus_TenLargestCustomersMember
89.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_MajorCustomersAxis
= crus_TenLargestCustomersMember
Apple, Inc. [Member] | Sales [Member]      
Concentration risk, percentage 72.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_MajorCustomersAxis
= crus_AppleIncMember
80.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_MajorCustomersAxis
= crus_AppleIncMember
82.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_MajorCustomersAxis
= crus_AppleIncMember