Leases - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Leases [Line Items]
Lease obligations as percentage of present value of future minimum lease payments in lease arrangement	100.00%
Lease payments as a percentage of lease costs	100.00%
Floating, Storage and Offloading Vessel
Leases [Line Items]
North Malay Basin, offshore Peninsular Malaysia - Hess operated interest	50.00%	50.00%
Gain or loss on sale of transaction		$ 0
Finance lease term	14 years 3 months 18 days