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Related Party Transactions (Details) - USD ($)
$ in Millions
1 Months Ended 10 Months Ended 12 Months Ended
Dec. 31, 2016
Nov. 30, 2014
Nov. 14, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Related Party Transactions            
Limited partner interest     98.00%      
BridgeTex Pipeline Company, LLC (BridgeTex)            
Related Party Transactions            
Interest acquired           50.00%
Ownership interest 50.00%     50.00%    
BridgeTex Pipeline Company, LLC (BridgeTex) | Oxy            
Related Party Transactions            
Interest acquired   50.00%        
General Partner            
Related Party Transactions            
Costs reimbursed to general partner       $ 514 $ 648 $ 598
Oxy            
Related Party Transactions            
Revenues       655 866 1,212
Purchases and related costs       42 41 925
Trade accounts receivable and other receivables $ 789     789 405  
Accounts payable 836     836 363  
Equity Method Investees            
Related Party Transactions            
Revenues       14 17 3
Costs related to services utilized       209 164 $ 75
Trade accounts receivable and other receivables 39     39 14  
Prepaid tariff costs 14     14    
Accounts payable $ 35     $ 35 $ 25  
Equity Method Investees | Agreement to Transport Crude Oil            
Related Party Transactions            
Ownership interest 50.00%     50.00%    
Shares Class C | PAGP            
Related Party Transactions            
Class C shares of PAGP held by PAA 491,910,863          
Omnibus Agreement            
Related Party Transactions            
Expenses paid on behalf of affiliates       $ 4    
AAP | PAGP            
Related Party Transactions            
Limited partner interest       42.00%    
AAP | Oxy            
Related Party Transactions            
Limited partner interest 13.00%