XML 61 R45.htm IDEA: XBRL DOCUMENT
v3.20.4

Description of Business (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020
Minimum |
Length of time the business has been in operation | 140 years

X
- Definition Represents the period of time the entity has been in business. + References No definition available. + Details
Name: | wts_PeriodOfBusinessOperations
Namespace Prefix: | wts_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |