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Equity (Details) - EUR (€) € in Millions	Dec. 31, 2022	Dec. 31, 2021
Equity
Share capital	€ 4,005	€ 4,005
Retained earnings	23,455	22,750
Cumulative currency translation differences	7,564	6,530
Perpetual subordinated bonds	5,000	5,000
Legal reserve	959	959
Reserve for treasury shares	2,937	958
Reserve for OCI on cash flow hedging derivatives net of the tax effect	(342)	(896)
Reserve for OCI on defined benefit plans net of tax effect	(58)	(117)
Reserve for OCI on equity-accounted investments	46	54
Reserve for OCI on other investments valued at fair value	53	141
Other reserves	190	190
Treasury shares	(2,937)	(958)
Net profit (loss) for the year	13,887	5,821
Equity attributable to equity holders of Eni	€ 54,759	€ 44,437

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- Definition

The amount of miscellaneous other reserves.

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Carrying value of perpetual subordinated bonds issued by the company.

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The profit (loss) attributable to ordinary equity holders of the parent equity.

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The amount of reserve of share of other comprehensive income of investments accounted for using equity method.

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- Definition

A component of equity representing the reserve for the redemption of the entity's own shares.

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The amount of equity attributable to the owners of the parent. This specifically excludes non-controlling interest.

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The nominal value of capital issued.

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A component of equity representing the accumulated portion of gain (loss) on a hedging instrument that is determined to be an effective hedge for cash flow hedges. [Refer: Cash flow hedges [member]]

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A component of equity representing exchange differences on translation of financial statements recognised in other comprehensive income and accumulated in equity. [Refer: Other comprehensive income]

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A component of equity representing accumulated gains and losses from investments in equity instruments that the entity has designated at fair value through other comprehensive income.

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A component of equity representing the accumulated remeasurements of defined benefit plans. [Refer: Defined benefit plans [member]]

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A component of equity representing the entity’s cumulative undistributed earnings or deficit excluding the profit or loss for the reporting period. [Refer: Retained earnings]

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A component of equity representing reserves created based on legal requirements.

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An entity’s own equity instruments, held by the entity or other members of the consolidated group.

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