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Debt - Senior Notes (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Nov. 30, 2024
Oct. 31, 2023
Jan. 31, 2023
Mar. 31, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Jun. 15, 2025
Jan. 31, 2025
Debt Instrument [Line Items]                  
Repayments of PAA senior notes         $ 750 $ 1,100 $ 750    
PAA Senior Notes                  
Debt Instrument [Line Items]                  
Debt instrument face value         $ 7,200 $ 7,300      
PAA Senior Notes | 5.70% senior notes due September 2034                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate (as a percent)         5.70%        
Debt instrument, issued face value, percentage         99.953%        
Debt instrument face value         $ 650        
Long-term debt, before deducting unamortized discounts and debt issuance costs         $ 650        
PAA Senior Notes | 5.95% Senior Notes Due June 2035 | Subsequent Event                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate (as a percent)                 5.95%
Debt instrument, issued face value, percentage               99.761%  
Debt instrument face value                 $ 1,000
PAA Senior Notes | 3.60% senior notes due November 2024                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate (as a percent) 3.60%       3.60% 3.60%      
Long-term debt, before deducting unamortized discounts and debt issuance costs         $ 0 $ 750      
Repayments of PAA senior notes $ 750                
PAA Senior Notes | 3.85% senior notes due October 2023                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate (as a percent)   3.85%              
Repayments of PAA senior notes   $ 700              
PAA Senior Notes | 2.85% senior notes due January 2023                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate (as a percent)     2.85%            
Repayments of PAA senior notes     $ 400            
PAA Senior Notes | 3.65% senior notes due June 2022                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate (as a percent)       3.65%          
Repayments of PAA senior notes       $ 750          
Consolidated Finance Subsidiary Issuer                  
Debt Instrument [Line Items]                  
Consolidated subsidiary, ownership interest held by the parent (as a percent)         100.00%