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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2021
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table presents our revenue disaggregated by major product and service lines (in millions):
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Product | $ | 1,255.0 |  |  | $ | 916.4 |  |  | $ | 788.5 |
Service: |  |  |  |  |
Security subscription | 1,125.0 |  |  | 918.7 |  |  | 750.8 |
Technical support and other | 962.2 |  |  | 759.3 |  |  | 623.7 |
Total service revenue | 2,087.2 |  |  | 1,678.0 |  |  | 1,374.5 |
Total revenue | $ | 3,342.2 |  |  | $ | 2,594.4 |  |  | $ | 2,163.0 |

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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=123351226&loc=SL49130545-203045 + Details
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