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REVENUE - Recurring vs. Up-front Revenue (Details) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Revenue from External Customer [Line Items] |  |  |
Revenue from Contract with Customer, Timing of Goods or Service, Percent | 100.00% | 100.00% | 100.00%
Transferred over Time |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from Contract with Customer, Timing of Goods or Service, Percent | 83.00% | 84.00% | 85.00%
Transferred over Time | Revenue arrangement recognized over time |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from Contract with Customer, Timing of Goods or Service, Percent | 80.00% | 81.00% | 83.00%
Transferred over Time | Revenue arrangement with non-cancelable commitments |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from Contract with Customer, Timing of Goods or Service, Percent | 3.00% | 3.00% | 2.00%
Transferred at Point in Time |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from Contract with Customer, Timing of Goods or Service, Percent | 17.00% | 16.00% | 15.00%

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- Definition Revenue from Contract with Customer, Timing of Goods or Service, Percent + References No definition available. + Details
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Namespace Prefix: | cdns_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | cdns_ArrangementTypeAxis=cdns_RevenueArrangementRecognizedOverTimeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |