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Summary Of Significant Accounting Policies (Narrative) (Details) $ in Millions	Mar. 31, 2023 USD ($) a	Mar. 31, 2022 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Restricted cash | $	$ 126	$ 166
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

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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