XML 88 R73.htm IDEA: XBRL DOCUMENT v3.20.4

Income Taxes - Summary Of Valuation Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2017
Beginning Balance	$ 51,221	$ 53,893	$ 62,098
Charged to Provision for Income Taxes	1,137	(1,242)	(2,128)
Other	7,743	(1,430)	(6,077)
Ending Balance	$ 60,101	$ 51,221	$ 53,893

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

+ Details

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Valuation Allowance Deferred Tax Asset Change Others.

+ References

No definition available.

+ Details

Name:	wat_ValuationAllowanceDeferredTaxAssetChangeOthers
Namespace Prefix:	wat_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Valuation allowance deferred yax asset charged to income tax provision.

+ References

No definition available.

+ Details

Name:	wat_ValuationAllowanceDeferredTaxAssetChargedToIncomeTaxProvision
Namespace Prefix:	wat_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration