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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
Store
State
Entity
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Significant Accounting Policies [Line Items]      
Allowance for doubtful accounts $ 15,807 $ 21,528  
Capitalized vendor rebates 19,171 18,688  
Goodwill and intangible assets impairment 0 0 $ 0
Accrued sales returns 21,293 21,392  
Selling, general and administrative expense 1,293,439 1,223,507 1,221,382
Cash discounts recorded as a reduction of inventories 14,824 22,628  
Finance lease ROU assets 20,972 16,328  
Finance lease liabilities $ 21,770 $ 16,892  
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease, Right-of-Use Asset Operating Lease, Right-of-Use Asset  
Reduction in inventories related to pricing claim advances $ 85,301 $ 85,913  
U.S. Joint Ventures and their subsidiaries with Carrier Corp. [Member]      
Significant Accounting Policies [Line Items]      
Number of joint ventures | Entity 5    
Controlling Interest Percentage 80.00%    
Non Controlling Interest Percentage 20.00%    
Shipping and Handling [Member]      
Significant Accounting Policies [Line Items]      
Selling, general and administrative expense $ 84,762 82,600 86,620
Advertising Expense [Member]      
Significant Accounting Policies [Line Items]      
Selling, general and administrative expense $ 25,337 $ 28,236 $ 25,884
Minimum [Member]      
Significant Accounting Policies [Line Items]      
Operating Lease Remaining Lease Term 1 year    
Maximum [Member]      
Significant Accounting Policies [Line Items]      
Operating Lease Remaining Lease Term 10 years    
Maximum [Member] | Sales Revenue, Net [Member]      
Significant Accounting Policies [Line Items]      
Percentage of Service Revenue 1.00% 1.00% 1.00%
Buildings and Improvements [Member] | Minimum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 3 years    
Buildings and Improvements [Member] | Maximum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 40 years    
Machinery and Equipment [Member] | Minimum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 3 years    
Machinery and Equipment [Member] | Maximum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 10 years    
Computer Hardware And Software [Member] | Minimum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 3 years    
Computer Hardware And Software [Member] | Maximum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 10 years    
Furniture and Fixtures [Member] | Minimum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 5 years    
Furniture and Fixtures [Member] | Maximum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 7 years    
Watsco, Inc. [Member]      
Significant Accounting Policies [Line Items]      
Number of locations from which entity operates | Store 690    
Number of states in which entity operates | State 43    
Carrier and Its Affiliates [Member]      
Significant Accounting Policies [Line Items]      
Reduction in inventories related to pricing claim advances $ 60,234 $ 63,546  
Carrier and Its Affiliates [Member] | Canadian Joint Venture [Member]      
Significant Accounting Policies [Line Items]      
Controlling Interest Percentage 60.00%    
Non Controlling Interest Percentage 40.00%