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Subsequent Event - Additional Information (Detail) - $ / shares			12 Months Ended
	Apr. 01, 2022	Feb. 08, 2022	Dec. 31, 2021
Subsequent Event [Line Items]
Cash dividend, common stock and Class B common stock previous rate			$ 1.95
Subsequent Event
Subsequent Event [Line Items]
Cash dividend, common stock and Class B common stock current rate rate		$ 2.20
Effective date of increase in quarterly cash dividend rate	2022-04

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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- Definition

Board approved quarterly cash dividend rate applicable to april twenty twenty two.

+ References

No definition available.

+ Details

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- Definition

Board approved quarterly cash dividend rate previous per share amount.

+ References

No definition available.

+ Details

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Namespace Prefix:	wso_
Data Type:	dtr-types:perShareItemType
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- Definition

Effective date of board approved quarterly cash dividend rate per share amount.

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No definition available.

+ Details

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- Details

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