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Investment in Unconsolidated Entity - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Ownership percentage needed for right to purchase up to 100%	85.00%
Total number of board members	6
Number of board members that can be appointed based on ownership	2
Carrier Enterprise LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest acquired	38.10%

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

Maximum ownership percentage prior to buyout option.

+ References

No definition available.

+ Details

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Namespace Prefix:	wso_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Total number of board members allowed to be appointed by the shareholders agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	wso_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of directors appointed based on ownership owned

+ References

No definition available.

+ Details

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Namespace Prefix:	wso_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: