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v3.24.3

Basis of Presentation - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2024 Entity
Income Tax [Line Items] |
Number of Joint Ventures | 4
Minimum [Member] | Individual Tax Jurisdictions [Member] |
Income Tax [Line Items] |
Percentage threshold to disclose the amount of income taxes paid by individual jurisdictions | 5.00%

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- Definition Income Tax. + References No definition available. + Details
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Namespace Prefix: | wso_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of joint ventures. Joint ventures are entities operated by the controlling interest for the mutual benefit of the members. + References No definition available. + Details
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Namespace Prefix: | wso_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage threshold to disclose amount of income taxes paid by individual jurisdictions. + References No definition available. + Details
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Namespace Prefix: | wso_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=wso_IndividualTaxJurisdictionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |