Other Long-Term Liabilities - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Terms of the contracts extendible	2038
Amortization of liabilities as a reduction of production expenses	$ 8
Liability for the estimated potential exposure for the remainder of the contract term	164
Other liabilities noncurrent	128
Other current liabilities	$ 1,246	$ 536
Probability weighted cash flows for the remainder of the contract term	5 years
Other Current Liabilities [Member] | Delaware Basin
Other current liabilities	$ 36