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Organization and Basis of Consolidation and Presentation - Segments and Ownership (Details)
shares in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2022
segment
shares
Sep. 30, 2021
segment
Sep. 30, 2022
segment
Organization      
Operating segments number | segment 2 3 2
AAP | PAGP      
Organization      
Ownership interest 81.00%    
PAA | AAP      
Organization      
Ownership interest (units) | shares 241.5    
Ownership interest 31.00%