Other Operating Expense - Narrative (Details) $ in Millions	12 Months Ended
Dec. 31, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Expenses recognized	$ 80
Decrease in future commitments	169
Wildhorse resource development corporation
Property, Plant and Equipment [Line Items]
Business acquisition transaction costs	37
Severance costs	$ 38

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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