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v3.20.1

Deferred Revenues (Detail) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred Revenue Arrangement [Line Items] |  |
Deferred revenue | $ 1,386.7 | $ 1,338.0
Security subscriptions |  |
Deferred Revenue Arrangement [Line Items] |  |
Deferred revenue | 613.1 | 554.2
Software updates and maintenance |  |
Deferred Revenue Arrangement [Line Items] |  |
Deferred revenue | 757.4 | 765.9
Other |  |
Deferred Revenue Arrangement [Line Items] |  |
Deferred revenue | $ 16.2 | $ 17.9

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- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(5)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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