Accounting For Suspended Exploratory Well Costs (Schedule Of Number Of Projects With Suspended Exploratory Well Costs) (Details) - project	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Oil and Gas, Capitalized Exploratory Well Cost [Abstract]
Number of projects that only have exploratory well costs capitalized for a period of one year or less	5	0	10
Number of projects that have exploratory well costs capitalized for a period greater than one year	24	31	26
Total	29	31	36

Number of projects for exploratory well cost capitalized for period of greater than one year after completion of drilling in oil- and gas-producing activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant