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Risk Management (Notional Amounts and Terms of Company's Derivative Financial Instruments) (Details)
bcf in Millions, MMBbls in Millions, $ in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
bcf
MMBbls
Dec. 31, 2021
USD ($)
bcf
MMBbls
Dec. 31, 2020
USD ($)
Derivative [Line Items]      
Product revenues $ 548.6 $ 486.7 $ 214.3
Aggregate fair value of commodity derivative instruments 8.1    
Commodity Contract      
Derivative [Line Items]      
Product costs, net $ (9.4) $ 44.5 $ 20.7
Propane, ethane, butane, heating oil and crude oil (MMBbls) | Fixed Price Payor      
Derivative [Line Items]      
Notional amount | MMBbls 67.2 71.6  
Propane, ethane, butane, heating oil and crude oil (MMBbls) | Fixed Price Receiver      
Derivative [Line Items]      
Notional amount | MMBbls 70.2 75.8  
Natural gas (Bcf) | Fixed Price Payor      
Derivative [Line Items]      
Notional amount | bcf 44.2 31.9  
Natural gas (Bcf) | Fixed Price Receiver      
Derivative [Line Items]      
Notional amount | bcf 48.4 43.4