Summary Of Significant Accounting Policies (Narrative) (Details) $ in Millions		12 Months Ended
	Jan. 07, 2021	Dec. 31, 2022 USD ($) a Customer	Dec. 31, 2021 USD ($) Customer	Dec. 31, 2020 USD ($) Customer
Summary Of Significant Accounting Policies [Line Items]
Conversion of common stock into right to received per share	0.5165
Number of customers | Customer		1	2	2
Derivative collateral held		$ 0
Cash collateral posted		0
Restricted cash		140	$ 172	$ 190
Goodwill, Impairment Loss		0	0	$ 0
Barnett Shale [Member]
Summary Of Significant Accounting Policies [Line Items]
Restricted cash		$ 120	$ 160
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Other property and equipment, useful life			3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Other property and equipment, useful life		60 years
Customer Concentration Risk [Member] | One Customer [Member] | Consolidated Sales Revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage		15.00%	19.00%	13.00%
Customer Concentration Risk [Member] | Two Customer [Member] | Consolidated Sales Revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage			12.00%	10.00%
Upstream Revenues [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days allowed for payment from end of production month		30 days
Marketing Revenues [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days allowed for payment of invoiced amount		30 days
CDM [Member] | QL Capital Partners, LP [Member]
Summary Of Significant Accounting Policies [Line Items]
Cash distribution from entities		$ 30	$ 20	$ 14
Cash contributed to entities			$ 3	$ 21
Devon and WPX Agreement [Member]
Summary Of Significant Accounting Policies [Line Items]
Date of agreement	Jan. 07, 2021	Jan. 07, 2021
Conversion of common stock into right to received per share	0.5165
WPX and Howard Energy Partners [Member]
Summary Of Significant Accounting Policies [Line Items]
Voting interest in the join venture legal entity		50.00%
Catalyst [Member]
Summary Of Significant Accounting Policies [Line Items]
Area of land | a		50,000
Investment in Catalyst		$ 339
Net assets		$ 120