XML 62 R50.htm IDEA: XBRL DOCUMENT v3.7.0.1
Investments & NCI Sherwood Midstream (Details)
bbl / d in Thousands, $ in Millions
 3 Months Ended 6 Months Ended
Jan. 01, 2017
USD ($)
bbl / d
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Schedule of Equity Method Investments [Line Items]            
Contribution of fixed assets to joint venture [1]       $ 337 $ 0  
Assets, Current   $ 843   843   $ 868
Liabilities, Current   790   790   763
Equity method investments   3,368   3,368   $ 2,471
Operational service revenue   $ 25 $ 24 $ 47 $ 45  
Sherwood Midstream LLC [Member]            
Schedule of Equity Method Investments [Line Items]            
Equity Method Investment, Ownership Percentage   50.00%   50.00%    
Contribution of fixed assets to joint venture $ 134          
Payments to Acquire Interest in Joint Venture $ 20          
Equity method investments   $ 192   $ 192    
Operational service revenue   3   4    
MarkWest Ohio Fractionation Company, L.L.C. [Member]            
Schedule of Equity Method Investments [Line Items]            
Capacity | bbl / d 20          
Assets, Current   13   13    
Assets, Noncurrent   389   389    
Liabilities, Current   $ 377   $ 377    
Sherwood Midstream LLC [Member] | MarkWest Ohio Fractionation Company, L.L.C. [Member]            
Schedule of Equity Method Investments [Line Items]            
Payments to Acquire Interest in Joint Venture $ 126          
Antero Midstream Partners L.P. [Member] | Sherwood Midstream LLC [Member]            
Schedule of Equity Method Investments [Line Items]            
Payments to Acquire Interest in Joint Venture $ 154          
[1] Contribution of assets to Sherwood Midstream and Sherwood Midstream Holdings. See Note 4.