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Acquisition (Schedule of Changes in Goodwill) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 28, 2015 | Mar. 29, 2014 | Sep. 27, 2014
--- | --- | --- | ---
Goodwill | $ 263,115 us-gaap_Goodwill | $ 16,367 us-gaap_Goodwill |
Wolfson [Member] |  |  |
Inventory | 30,530 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / dei_LegalEntityAxis = crus_WolfsonMember |  | 28,658 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / dei_LegalEntityAxis = crus_WolfsonMember
Other current assets | 16,226 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / dei_LegalEntityAxis = crus_WolfsonMember |  | 15,633 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / dei_LegalEntityAxis = crus_WolfsonMember
Property, plant and equipment | 27,398 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment / dei_LegalEntityAxis = crus_WolfsonMember |  | 29,093 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment / dei_LegalEntityAxis = crus_WolfsonMember
Deferred tax liability - current | (11,958)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / dei_LegalEntityAxis = crus_WolfsonMember |  | (11,483)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / dei_LegalEntityAxis = crus_WolfsonMember
Other accrued liabilities | (39,417)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / dei_LegalEntityAxis = crus_WolfsonMember |  | (41,417)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / dei_LegalEntityAxis = crus_WolfsonMember
Goodwill | 246,748 us-gaap_Goodwill / dei_LegalEntityAxis = crus_WolfsonMember |  | 249,043 us-gaap_Goodwill / dei_LegalEntityAxis = crus_WolfsonMember
Changes in Fair Value [Member] |  |  |
Inventory | 1,872 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / dei_LegalEntityAxis = crus_ChangesInFairValueMember |  |
Other current assets | 593 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / dei_LegalEntityAxis = crus_ChangesInFairValueMember |  |
Property, plant and equipment | (1,695)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment / dei_LegalEntityAxis = crus_ChangesInFairValueMember |  |
Deferred tax liability - current | (475)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / dei_LegalEntityAxis = crus_ChangesInFairValueMember |  |
Other accrued liabilities | 2,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / dei_LegalEntityAxis = crus_ChangesInFairValueMember |  |
Goodwill | $ (2,295)us-gaap_Goodwill / dei_LegalEntityAxis = crus_ChangesInFairValueMember |  |

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