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Commitments and Contingencies (Narrative) (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Mar. 28, 2015 | Mar. 29, 2014 | Mar. 30, 2013 | Dec. 22, 2011
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |  |  |
Rent expense | $ 4,000,000 us-gaap_LeaseAndRentalExpense | $ 2,800,000 us-gaap_LeaseAndRentalExpense | $ 3,200,000 us-gaap_LeaseAndRentalExpense |
Sublease rental income | 100,000 us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 | 100,000 us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 | 100,000 us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 |
Tucson, Arizona Facility [Member] |  |  |  |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |  |  |
Square footage of Tucson facilities | 28,000 us-gaap_AreaOfRealEstateProperty / crus_LeasedFacilitiesAxis = crus_TucsonArizonaFacilityMember |  |  |
Capacity Investment and Loading Agreement with STATS ChipPAC Ltd [Member] |  |  |  |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |  |  |
Non-cancelable purchase commitments |  |  |  | 10,000,000 us-gaap_PurchaseObligation / us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis = crus_CapacityInvestmentAndLoadingAgreementWithStatsChippacLtdMember
Purchase commitment, rebate amount | 10,000,000 crus_PurchaseObligationRebateAmount / us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis = crus_CapacityInvestmentAndLoadingAgreementWithStatsChippacLtdMember |  |  |
Foundry Commitments [Member] |  |  |  |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |  |  |
Non-cancelable purchase commitments | 98,200,000 us-gaap_PurchaseObligation / us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis = crus_FoundryCommitmentsMember |  |  |
Assembly Purchase Order Commitments [Member] |  |  |  |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |  |  |
Non-cancelable purchase commitments | 5,500,000 us-gaap_PurchaseObligation / us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis = crus_AssemblyPurchaseOrderCommitmentsMember |  |  |
Outside Test Services Commitments [Member] |  |  |  |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |  |  |
Non-cancelable purchase commitments | 10,200,000 us-gaap_PurchaseObligation / us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis = crus_OutsideTestServicesCommitmentsMember |  |  |
Long-term Other Purchase Obligation [Member] |  |  |  |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |  |  |
Non-cancelable purchase commitments | $ 46,800,000 us-gaap_PurchaseObligation / us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis = crus_LongTermOtherPurchaseObligationMember |  |  |

X
- Definition Purchase Obligation, Rebate Amount + References No definition available. + Details
Name: | crus_PurchaseObligationRebateAmount
Namespace Prefix: | crus_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
Name: | us-gaap_OperatingLeasesRentExpenseSubleaseRentals1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
Name: | us-gaap_PurchaseObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | crus_LeasedFacilitiesAxis=crus_TucsonArizonaFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=crus_AssemblyPurchaseOrderCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=crus_CapacityInvestmentAndLoadingAgreementWithStatsChippacLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=crus_FoundryCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=crus_LongTermOtherPurchaseObligationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=crus_OutsideTestServicesCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |