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Revenue Recognition - Schedule of Estimated Amount of Deferred Revenue and Customer Advances (Detail) $ in Thousands | Mar. 31, 2018 USD ($)
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Revenue Recognition [Abstract] |
Deferred revenue and customer advances expected to be recognized, in one year or less | $ 214,979
Deferred revenue and customer advances expected to be recognized, in 13-24 months | 21,139
Deferred revenue and customer advances expected to be recognized, in 25 months and beyond | 11,125
Deferred revenue and customer advances expected to be recognized, Total | $ 247,243

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

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- Definition Deferred revenue and customer advances. + References No definition available. + Details
Name: | wat_DeferredRevenueAndCustomerAdvances
Namespace Prefix: | wat_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Deferred revenue and customer advances to be recognized in year three and beyond. + References No definition available. + Details
Name: | wat_DeferredRevenueAndCustomerAdvancesToBeRecognizedInYearThreeAndBeyond
Namespace Prefix: | wat_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Deferred revenue and customer advances to be recognized in year two. + References No definition available. + Details
Name: | wat_DeferredRevenueAndCustomerAdvancesToBeRecognizedInYearTwo
Namespace Prefix: | wat_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Deferred revenue and customer advances to be recognized next twelve months. + References No definition available. + Details
Name: | wat_DeferredRevenueAndCustomerAdvancesToBeRecognizedNextTwelveMonths
Namespace Prefix: | wat_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant