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Debt - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Mar. 31, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Jun. 30, 2018
Dec. 31, 2017
Debt Instrument Redemption [Line Items]              
Debt instrument redemption amount           $ 138,000,000  
Current maturities of long-term debt $ 85,000,000     $ 85,000,000     $ 580,000,000
Redeemed and repurchased debt       terminated interest rate swaps with a notional amount of $350 million.      
Loss on debt extinguishment $ 0   $ 0 $ 53,000,000 $ 0    
Loss on debt extinguishment, after income tax       53,000,000      
Proceeds from asset sales       $ 607,000,000 $ 783,000,000    
Floating, Storage and Offloading Vessel              
Debt Instrument Redemption [Line Items]              
North Malay Basin, offshore Peninsular Malaysia - Hess operated interest 50.00%     50.00%      
Proceeds from asset sales $ 260,000,000            
Lease description       The lease agreement is for 16 years with four consecutive twelve-month renewal options that may be exercised at our discretion.      
Capital leases carrying value $ 273,000,000     $ 273,000,000      
Percentage of present value of future minimum lease payments equal to carrying value of lease obligations 100.00%     100.00%      
Capital lease obligation included in current maturities of long-term debt $ 15,000,000     $ 15,000,000      
Capital lease obligation included in long-term debt 258,000,000     258,000,000      
Gain or loss on sale of transaction $ 0     $ 0      
8.125% Notes Due 2019              
Debt Instrument Redemption [Line Items]              
Debt instrument redemption amount   $ 415,000,000          
Debt instrument redemption of principal amount   $ 350,000,000          
Debt instrument interest rate   8.125%          
Debt instrument maturity year   2019          
Other Notes              
Debt Instrument Redemption [Line Items]              
Current maturities of long-term debt   $ 38,000,000          
Notes Payable              
Debt Instrument Redemption [Line Items]              
Current maturities of long-term debt           $ 112,000,000