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Postretirement Benefit Plans (Narrative) (Details) (USD $) | 9 Months Ended | 12 Months Ended | 15 Months Ended
--- | --- | --- | ---
Dec. 28, 2013 | Mar. 28, 2015 | Mar. 29, 2014 | Mar. 30, 2013 | Mar. 28, 2015
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate |  | 3.20%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate |  |  | 3.20%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year |  | $ 1,400,000 us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear |  |  |
Other long-term obligations |  | 8,786,000 us-gaap_OtherLiabilitiesNoncurrent | 4,010,000 us-gaap_OtherLiabilitiesNoncurrent |  | 8,786,000 us-gaap_OtherLiabilitiesNoncurrent
Maximum employer contribution matching percentage |  | 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch | 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch |  |
Percentage of employees' annual contribution that qualifies for employer contribution matching | 6.00%crus_DefinedContributionPlanEmployerMatchingContributionCapPercent |  |  |  | 8.00%crus_DefinedContributionPlanEmployerMatchingContributionCapPercent
Defined Contribution Plan, Cost Recognized |  | 2,500,000 us-gaap_DefinedContributionPlanCostRecognized | 1,800,000 us-gaap_DefinedContributionPlanCostRecognized | 1,500,000 us-gaap_DefinedContributionPlanCostRecognized |
Pension Plan [Member] |  |  |  |  |
Other long-term obligations |  | 600,000 us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = crus_PensionPlanMember |  |  | 600,000 us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = crus_PensionPlanMember
Defined Contribution Plan, Cost Recognized |  | $ 1,650,000 us-gaap_DefinedContributionPlanCostRecognized / dei_LegalEntityAxis = crus_PensionPlanMember |  |  |

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- Definition Defined Contribution Plan Employer Matching Contribution Cap Percent + References No definition available. + Details
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- Definition The interest rate used to adjust for the time value of money for the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 24 -Article 5 + Details
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- Details
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