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Partners' Capital and Distributions - Narrative (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
6 Months Ended
May 15, 2025
Feb. 18, 2025
Feb. 14, 2025
Jan. 31, 2025
Jun. 30, 2025
Jan. 30, 2025
Partners' Capital and Distributions [Line Items]            
Payments for repurchase of preferred stock and preference stock         $ 333  
Series B Preferred Units | PAA | Other current liabilities            
Partners' Capital and Distributions [Line Items]            
Amount accrued to distributions payable         $ 9  
Series B Preferred Units | PAA | Cash Distribution            
Partners' Capital and Distributions [Line Items]            
Preferred unit distribution amount $ 17 $ 18        
Series A Preferred Units | PAA            
Partners' Capital and Distributions [Line Items]            
Stock repurchased and retired during period (shares)       12.7    
Shares issued, price per share (in dollars per unit)       $ 26.25    
Payments for repurchase of preferred stock and preference stock       $ 333    
Number of days after end of quarter within which distributions must be paid to unitholders         45 days  
Series A Preferred Units | PAA | Other current liabilities            
Partners' Capital and Distributions [Line Items]            
Amount accrued to distributions payable           $ 10
Series A Preferred Units | PAA | Cash Distribution            
Partners' Capital and Distributions [Line Items]            
Preferred unit distribution amount $ 36   $ 36      
PAA | Common Units and Series A Preferred Units            
Partners' Capital and Distributions [Line Items]            
Noncontrolling interests in subsidiaries (as a percent)         69.00%  
PAA | Series B Preferred Units            
Partners' Capital and Distributions [Line Items]            
Noncontrolling interests in subsidiaries (as a percent)         100.00%  
AAP            
Partners' Capital and Distributions [Line Items]            
Noncontrolling interests in subsidiaries (as a percent)         15.00%  
Permian JV            
Partners' Capital and Distributions [Line Items]            
Noncontrolling interests in subsidiaries (as a percent)         35.00%  
Cactus II            
Partners' Capital and Distributions [Line Items]            
Noncontrolling interests in subsidiaries (as a percent)         30.00%  
Red River            
Partners' Capital and Distributions [Line Items]            
Noncontrolling interests in subsidiaries (as a percent)         33.00%