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Business Combinations and Divestitures - Additional Information (Detail)
$ in Millions
3 Months Ended 12 Months Ended
Oct. 27, 2020
USD ($)
Dec. 31, 2020
USD ($)
PartnershipUnit
Sep. 30, 2022
USD ($)
PartnershipUnit
Propane Assets      
Business Acquisition [Line Items]      
Cash proceeds from sale of assets $ 6.1    
Heating Oil Dealers | Scenario Forecast      
Business Acquisition [Line Items]      
Number of businesses acquired | PartnershipUnit     3
Aggregate purchase price partnership acquired     $ 4.2
Cash paid     3.3
Deferred liabilities     0.9
Aggregate purchase price allocation, intangible assets     2.9
Aggregate purchase price allocation, fixed assets     2.1
Gross purchase price increased (reduced) by working capital credits     $ (0.8)
Propane Dealers      
Business Acquisition [Line Items]      
Number of businesses acquired | PartnershipUnit   2  
Aggregate purchase price partnership acquired   $ 37.9  
Cash paid   37.1  
Deferred liabilities   0.8  
Aggregate purchase price allocation, intangible assets   32.7  
Aggregate purchase price allocation, fixed assets   5.7  
Gross purchase price increased (reduced) by working capital credits   $ (0.5)