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v3.20.1

Revenues by Product Lines (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenue from External Customer [Line Items] |  |  |  |
Total revenues |  | $ 1,994.8 | $ 1,916.5 | $ 1,854.7
Network Security Gateways |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues |  | 455.9 | 468.5 | 506.0
Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | [1] | 54.9 | 57.1 | 53.0
Products and licenses |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues |  | 510.8 | 525.6 | 559.0
Security subscriptions |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues |  | 610.3 | 542.3 | 480.4
Software updates and maintenance |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues |  | $ 873.7 | $ 848.6 | $ 815.3
[1] | Comprised of Endpoint security, Mobile security and Security management products, each comprising of less than 10% of products and licenses revenues.

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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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