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Geographic Information and Selected Statements of Income Data - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2017 Product
Segment Reporting [Abstract] |
Number of main product lines | 3

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- Definition Number Of Product Lines + References No definition available. + Details
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Namespace Prefix: | chkp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration