Accounting For Suspended Exploratory Well Costs (Narrative) (Details) - project	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Oil and Gas, Capitalized Exploratory Well Cost [Abstract]
Number of projects that have exploratory well costs capitalized for a period greater than one year	24	31	26
Number of projects that have drilling in the preceding twelve months or exploratory activity planned in the next two years as of December 31.	11
Number of projects with completed exploratory activity progressing toward development as of December 31	13

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

Name:	us-gaap_ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant