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Summary of Significant Accounting Policies (Schedule of Revenue from Contracts with Customers Disaggregated Based on Type of Good) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Oil, gas and NGL sales	$ 15,919	$ 15,140	$ 19,827
Oil, Gas and NGL Sales [Member]
Disaggregation Of Revenue [Line Items]
Oil, gas and NGL sales	11,176	10,791	14,082
Oil, Gas and NGL Sales [Member] | Gas [Member]
Disaggregation Of Revenue [Line Items]
Oil, gas and NGL sales	398	703	1,948
Oil, Gas and NGL Sales [Member] | NGL [Member]
Disaggregation Of Revenue [Line Items]
Oil, gas and NGL sales	1,410	1,209	1,853
Oil, Gas and NGL Sales [Member] | Oil [Member]
Disaggregation Of Revenue [Line Items]
Oil, gas and NGL sales	9,368	8,879	10,281
Marketing and Midstream Revenues [Member]
Disaggregation Of Revenue [Line Items]
Oil, gas and NGL sales	4,743	4,349	5,745
Marketing and Midstream Revenues [Member] | Gas [Member]
Disaggregation Of Revenue [Line Items]
Oil, gas and NGL sales	517	572	1,163
Marketing and Midstream Revenues [Member] | NGL [Member]
Disaggregation Of Revenue [Line Items]
Oil, gas and NGL sales	821	759	1,277
Marketing and Midstream Revenues [Member] | Oil [Member]
Disaggregation Of Revenue [Line Items]
Oil, gas and NGL sales	$ 3,405	$ 3,018	$ 3,305

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