Debt And Related Expenses (Narrative) (Details) - USD ($)	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Repayments of long-term debt		$ 533,000,000
Early retirement of debt		(20,000,000)
Charge on early retirement of debt, noncash charges		27,000,000
Senior Credit Facility [Member]
Debt Instrument [Line Items]
Credit Facility, borrowing capacity	3,000,000,000.0
Outstanding credit facility borrowings	$ 0
Debt-to-capitalization ratio	0.65
Outstanding letters of credit	$ 2,000,000
Senior Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt-to-capitalization ratio	0.247
Senior Notes [Member]
Debt Instrument [Line Items]
Early retirement of debt		$ (20,000,000)
Charge on early retirement of debt, cash retirement costs	$ 47,000,000
Charge on early retirement of debt, noncash charges	27,000,000
6.00% Due 2022 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Repayments of long-term debt	$ 43,000,000
Debt interest rate, stated percentage	6.00%
5.875% Due 2028 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Repayments of long-term debt	$ 175,000,000
Debt interest rate, stated percentage	5.875%
4.5% Due 2030 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Repayments of long-term debt	$ 315,000,000
Debt interest rate, stated percentage	4.50%

Noncash gain (loss) on extinguishment of debt.

No definition available.

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Namespace Prefix:	dvn_
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Balance Type:	credit
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
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-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 1
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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 15
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- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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