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Crude oil or gas price assumption used for impairment calculations in each geographic area during the reporting period, presented in USD per unit, number of barrels of oil or mmbtu.

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debt to capital employed

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The amount, per share, of dividends recognised as distributions to owners.

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The increase (decrease) in equity resulting from treasury share transactions. [Refer: Equity; Treasury shares]

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The nominal value of capital issued.

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The number of shares issued by the entity.

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The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares]

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The nominal value per share.

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The decrease in equity resulting from the purchase of treasury shares. [Refer: Treasury shares]

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The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

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Shareholders' equity and dividends - narrative (Details)			12 Months Ended
	Feb. 08, 2022 USD ($) $ / shares $ / bbl	Sep. 08, 2021 USD ($)	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2021 NOK (kr) shares	Dec. 31, 2021 USD ($) $ / shares shares	Oct. 31, 2021 USD ($)	Jul. 31, 2021 USD ($)	Dec. 31, 2020 NOK (kr) shares	Dec. 31, 2020 USD ($) $ / shares shares
Total number of shares issued \| shares						3,257,687,707	3,257,687,707			3,257,687,707	3,257,687,707
Dividends declared per share \| $ / shares			$ 0.6300	$ 0.5600
Increase (decrease) through treasury share transactions, equity			$ (429,000,000)	$ (890,000,000)	$ (500,000,000)
Proposal of dividend declaration [member]
Dividends declared per share \| $ / shares	$ 0.20
Extraordinary dividend per share \| $ / shares	$ 0.20
Minimum [member] \| Share buy-back programme 2022 [member]
Percent of debt to capital employed	15.00%
Minimum [member] \| Share buy-back programme 2022 [member] \| Brent Blend oil price [member]
Estimated crude oil or Gas price per unit \| $ / bbl	50
Maximum [member] \| Share buy-back programme 2022 [member]
Percent of debt to capital employed	30.00%
Maximum [member] \| Share buy-back programme 2022 [member] \| Brent Blend oil price [member]
Estimated crude oil or Gas price per unit \| $ / bbl	60
Norwegian State [Member] \| Share buy-back programme 2022 [member]
Agreement to buy treasury shares	$ 1,000,000,000.0
Norwegian State [Member] \| Maximum [member] \| Share buy-back programme 2022 [member]
Agreement to buy treasury shares	$ 5,000,000,000.0
United States Dollar (USD) [Member]
Share capital							$ 1,163,987,792				$ 1,163,987,792
Norwegian kroner (NOK) [Member]
Share capital \| kr						kr 8,144,219,267.50				kr 8,144,219,267.50
Nominal value per share \| $ / shares							$ 2.50				$ 2.50
Treasury shares employees [member]
Treasury shares purchased			75,000,000	$ 68,000,000
Share buyback programme [member]
Number of shares outstanding \| shares					23,578,410	13,460,292	13,460,292			0	0
Share buyback programme [member] \| Third Party [Member]
Increase (decrease) through treasury share transactions, equity			$ 429,000,000
Share buyback programme [member] \| Share-based Payment Arrangement, Tranche One [member]
Agreement to buy treasury shares							$ 600,000,000		$ 300,000,000
Share buyback programme [member] \| Share-based Payment Arrangement, Tranche One [member] \| Norwegian State [Member]
Agreement to buy treasury shares								$ 201,000,000
Share buyback programme [member] \| Share-based Payment Arrangement, Tranche One [member] \| Third Party [Member]
Treasury shares purchased		$ 99,000,000
Share buyback programme [member] \| Share-based Payment Arrangement, Tranche One [member] \| Third Party [Member] \| Maximum [member]
Agreement to buy treasury shares								99,000,000
Share buyback programme [member] \| Share Based Payment Arrangement Tranche Two [member] \| Minimum [member]
Agreement to buy treasury shares								300,000,000
Share buyback programme [member] \| Share Based Payment Arrangement Tranche Two [member] \| Maximum [member]
Agreement to buy treasury shares								1,000,000,000.0
Share buyback programme [member] \| Share Based Payment Arrangement Tranche Two [member] \| Norwegian State [Member]
Agreement to buy treasury shares								670,000,000
Share buyback programme [member] \| Share Based Payment Arrangement Tranche Two [member] \| Third Party [Member]
Treasury shares purchased		232,000,000
Short-term obligation settled		222,000,000
Share buyback programme [member] \| Share Based Payment Arrangement Tranche Two [member] \| Third Party [Member] \| Maximum [member]
Agreement to buy treasury shares		$ 330,000,000						$ 330,000,000