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Revenue (Tables) | 6 Months Ended
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Jun. 27, 2020
Revenue from Contract with Customer [Abstract] |
Revenue from external customers by product group | The following table shows the percentage of product and related maintenance revenue contributed by each of Cadence’s five product categories and services for the three and six months ended June 27, 2020 and June 29, 2019:
| Three Months Ended |  |  |  | Six Months Ended |  |
| June 27, 2020 |  | June 29, 2019 |  | June 27, 2020 |  | June 29, 2019
Custom IC Design and Simulation | 24 | % |  | 26 | % |  | 25 | % |  | 26 | %
Digital IC Design and Signoff | 28 | % |  | 30 | % |  | 28 | % |  | 30 | %
Functional Verification, including Emulation and Prototyping Hardware* | 24 | % |  | 20 | % |  | 23 | % |  | 22 | %
IP | 14 | % |  | 15 | % |  | 14 | % |  | 13 | %
System Interconnect and Analysis | 10 | % |  | 9 | % |  | 10 | % |  | 9 | %
Total | 100 | % |  | 100 | % |  | 100 | % |  | 100 | %
_____________ * Includes immaterial amount of revenue accounted for under leasing arrangements.
Contract balances | Cadence’s contract balances as of June 27, 2020 and December 28, 2019 were as follows:
| As of |  |
| June 27, 2020 |  | December 28, 2019
| (In thousands) |  |
Contract assets | $ | 10,240 |  |  | $ | 10,209 |
Deferred revenue | 582,376 |  |  | 428,883 |

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599 + Details
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