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Revenue Recognition (Tables) | 3 Months Ended
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Mar. 31, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | Disaggregation of Revenue The following table presents our revenue disaggregated by major product and service lines (in millions):
| Three Months Ended
| March 31, 2020 |  | March 31, 2019
Product | $ | 192.3 |  |  | $ | 162.7 |
Service: |  |  |
Security subscription | 211.4 |  |  | 169.6 |
Technical support and other | 173.2 |  |  | 140.3 |
Total service revenue | 384.6 |  |  | 309.9 |
Total revenue | $ | 576.9 |  |  | $ | 472.6 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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