Commitments and Contingencies (Details)	Jun. 30, 2020 USD ($)
Loss Contingencies [Line Items]
Guarantees recorded	$ 4,000,000
Contingent royalty liability	101,000,000
Contingent capital and expense receivable, noncurrent	25,000,000
Estimated minimum monetary sanctions for Clean Air Act enforcement action	100,000
Performance of Equatorial Guinea LNG Operations, S.A.
Loss Contingencies [Line Items]
Guarantor obligations, maximum exposure	91,000,000
Performance of Alba Plant LLC.
Loss Contingencies [Line Items]
Guarantor obligations, maximum exposure	$ 25,000,000