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Hess Midstream LP (Detail) - USD ($)
shares in Thousands, $ in Millions
1 Months Ended 6 Months Ended
Mar. 31, 2021
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Variable Interest Entity [Line Items]        
Proceeds from sale of Class A shares of Hess Midstream LP $ 70 $ 70 $ 0  
Number of Class A shares of subsidiary public offering (in shares) 3,450      
Sale of Class A shares of Hess Midstream LP   97    
Liabilities   12,634   $ 12,486
Cash and cash equivalents   2,430   1,739
Property, plant and equipment, net   13,657   14,115
Capital in Excess of Par        
Variable Interest Entity [Line Items]        
Sale of Class A shares of Hess Midstream LP $ 56 56    
Noncontrolling Interests        
Variable Interest Entity [Line Items]        
Sale of Class A shares of Hess Midstream LP 41 41    
Noncontrolling Interests | Change In Ownership        
Variable Interest Entity [Line Items]        
Sale of Class A shares of Hess Midstream LP 14      
Noncontrolling Interests | Recognition Of Deferred Tax Asset        
Variable Interest Entity [Line Items]        
Sale of Class A shares of Hess Midstream LP $ 27      
Variable Interest Entity        
Variable Interest Entity [Line Items]        
Percent interest in consolidated entity 46.00%      
Variable Interest Entity | Hess Midstream LP        
Variable Interest Entity [Line Items]        
Cash and cash equivalents   4   3
Property, plant and equipment, net   3,101   3,111
Variable Interest Entity | Hess Midstream LP | Nonrecourse        
Variable Interest Entity [Line Items]        
Liabilities   1,945   2,026
Variable Interest Entity | Hess Midstream LP | Little Missouri Four        
Variable Interest Entity [Line Items]        
Equity Method Investments   $ 102   $ 108