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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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.

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Description of terms of award under share-based payment arrangement.

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Compensation Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Liability for share-based payment recognized in accounts payable and accrued liabilities	$ 6	$ 10
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	7 years
Stock Appreciation Rights (SARs) [Member] \| United States Of America Dollars [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, unvested award, outstanding	0	0
Share-based compensation, unvested award, unrecognized compensation costs	$ 0	$ 0
Stock Appreciation Rights (SARs) [Member] \| Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage	30.00%
Vesting period	1 year
Stock Appreciation Rights (SARs) [Member] \| Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage	30.00%
Vesting period	2 years
Stock Appreciation Rights (SARs) [Member] \| Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Tandem Stock Appreciation Rights (TSARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	7 years
Share-based compensation, unvested award, outstanding	0	0
Share-based compensation, unvested award, unrecognized compensation costs	$ 0	$ 0
Tandem Stock Appreciation Rights (TSARs) [Member] \| Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage	30.00%
Vesting period	1 year
Tandem Stock Appreciation Rights (TSARs) [Member] \| Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage	30.00%
Vesting period	2 years
Tandem Stock Appreciation Rights (TSARs) [Member] \| Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Share-based compensation, unvested award, unrecognized compensation costs	$ 22	$ 22
Share-based compensation, unvested award, unrecognized compensation costs expected to recognize over a weighted average period	1 year 8 months 12 days
Maximum multiplication of original performance stock units granted may be awarded	2
Performance Share Units [Member] \| United States Of America Dollars [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, unvested award, outstanding	1,029,000	943,000	1,307,000
Deferred Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award redemption description	For both Directors and employees, DSUs can only be redeemed following departure from Ovintiv in accordance with the terms of the respective DSU Plan and must be redeemed prior to December 15th of the year following the departure from Ovintiv.
Deferred Share Units [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion percentage of bonus awards into deferred share units	25.00%
Deferred Share Units [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion percentage of bonus awards into deferred share units	50.00%
Restricted Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, unvested award, unrecognized compensation costs	$ 39	$ 40
Share-based compensation, unvested award, unrecognized compensation costs expected to recognize over a weighted average period	1 year 3 months 18 days
Restricted Share Units [Member] \| Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights	RSUs issued to employees vest over their three-year service period.
Restricted Share Units [Member] \| Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Settlement period	3 years
Restricted Share Units [Member] \| United States Of America Dollars [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, unvested award, outstanding	1,967,000	1,878,000	2,225,000