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Equity Compensation (Summary of Restricted Stock Units Vested and Expected to Vest) (Details) (Restricted Stock Units (RSUs) [Member], USD $) Share data in Thousands, unless otherwise specified | 12 Months Ended
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Mar. 28, 2015
Restricted Stock Units (RSUs) [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Shares, Vested and expected to vest | 2,646 crus_SharesVestedAndExpectedToVest / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Weighted Average Fair Value, Vested and expected to vest | $ 25.57 crus_WeightedAverageFairValueVestedAndExpectedToVest / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Weighted Average Remaining Contractual Term, Vested and expected to vest | 1 year 5 months 16 days

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- Definition As of the balance sheet date, the number of shares into which fully vested and expected to vest restricted stock units outstanding can be converted under the plan. + References No definition available. + Details
Name: | crus_SharesVestedAndExpectedToVest
Namespace Prefix: | crus_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition As of the balance sheet date, the weighted-average fair value for restricted stock units that are fully vested or expected to vest. + References No definition available. + Details
Name: | crus_WeightedAverageFairValueVestedAndExpectedToVest
Namespace Prefix: | crus_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average remaining contractual term for fully vested and expected to vest restricted stock units, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | crus_WeightedAverageRemainingContractualTermVestedAndExpectedToVest
Namespace Prefix: | crus_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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