XML 55 R96.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Stock Repurchase Programs (Details Textual) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 28, 2019 | Dec. 29, 2018
Equity [Abstract] |  |
Remaining authorization for share repurchases | $ 369 | $ 175
Stock repurchase program additional authorized repurchase amount | $ 500 |

X
- Definition Stock Repurchase Program Additional Authorized Repurchase Amount + References No definition available. + Details
Name: | cdns_StockRepurchaseProgramAdditionalAuthorizedRepurchaseAmount
Namespace Prefix: | cdns_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant