XML 77 R57.htm IDEA: XBRL DOCUMENT v3.20.2
Nature of Operations (Details)
$ in Millions
12 Months Ended
Aug. 21, 2019
USD ($)
shares
Aug. 20, 2019
Aug. 01, 2019
shares
Sep. 30, 2020
county
Sep. 30, 2019
shares
Investment [Line Items]          
Number of counties of operation | county       1  
AmeriGas Propane | AmeriGas Partners          
Investment [Line Items]          
General Partner held a general partner interest in AmeriGas Partners (as a percentage)   1.00%      
Percentage of limited partnership interest in AmeriGas Partners (as a percentage)   25.50%      
AmeriGas Propane | AmeriGas OLP          
Investment [Line Items]          
Effective ownership interest in AmeriGas OLP (as a percentage)   27.00%      
Merger Sub          
Investment [Line Items]          
Total cash paid | $ $ 529        
Merger Sub | Common Stock          
Investment [Line Items]          
Consideration paid (in shares) | shares 34,612,847   34,613,000   34,613,000