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Partnership Distributions - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
May 02, 2017
Mar. 01, 2017
Mar. 31, 2018
Mar. 31, 2017
Distribution Made to Limited Partner [Line Items]        
Partnership agreement day requirement of distribution of available cash     55 days  
Western Gas Partners, LP [Member]        
Distribution Made to Limited Partner [Line Items]        
Partnership agreement day requirement of distribution of available cash     45 days  
Incentive distributions percentage     48.00%  
Western Gas Partners, LP [Member] | Minimum [Member]        
Distribution Made to Limited Partner [Line Items]        
Distribution sharing percentage     1.50%  
Western Gas Partners, LP [Member] | Maximum [Member]        
Distribution Made to Limited Partner [Line Items]        
Distribution sharing percentage     49.50%  
Western Gas Partners, LP [Member] | Class C Units [Member]        
Distribution Made to Limited Partner [Line Items]        
Discount rate percentage     6.00%  
Western Gas Partners, LP [Member] | Series A Preferred Units [Member]        
Distribution Made to Limited Partner [Line Items]        
Series A Preferred units, quarterly distribution per unit       $ 0.68
Series A Preferred units, quarterly cash distribution       $ 7.5
Western Gas Partners, LP [Member] | Series A Preferred Units [Member] | Series A Preferred Units March 2017 Conversion [Member]        
Distribution Made to Limited Partner [Line Items]        
Series A Preferred units, percentage converted   50.00%    
Series A Preferred units, common units issued upon conversion   1    
Western Gas Partners, LP [Member] | Series A Preferred Units [Member] | Series A Preferred Units May 2017 Conversion [Member]        
Distribution Made to Limited Partner [Line Items]        
Series A Preferred units, percentage converted 50.00%      
Series A Preferred units, common units issued upon conversion 1