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Share-Based Compensation (Schedule of Share-Based Compensation Expense Included In The Consolidated Statements Of Comprehensive Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense	$ 99	$ 88	$ 115
Related income tax benefit	13		13
G&A [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense	77	76	83
Exploration Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense	1	1	1
Restructuring and Transaction Costs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restructuring and transaction costs	$ 21	$ 11	$ 31

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

+ References

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- Definition

Amount of additional cost recognized for award under share-based payment arrangement from occurrence of event accelerating recognition of cost.

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