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Reconciliation of Unrecognized Tax Benefits (Parenthetical) (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Income Tax Disclosure [Abstract] |  |
Unrecognized tax benefit | $ 5,451 | $ 6,141

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- Definition Unrecognized tax benefit presented net from deferred tax asset. + References No definition available. + Details
Name: | chkp_UnrecognizedTaxBenefitPresentedNetFromDeferredTaxAsset
Namespace Prefix: | chkp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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