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Property, plant and equipment - Stratification of suspended wells (Details) € in Millions	Dec. 31, 2022 EUR (€) Wells	Dec. 31, 2021 EUR (€) Wells	Dec. 31, 2020 EUR (€) Wells	Dec. 31, 2019 EUR (€)
Property, plant and equipment
Property, plant and equipment	€ 56,332	€ 56,299	€ 53,943
Suspended exploration wells pending final determination
Property, plant and equipment
Property, plant and equipment	€ 1,085	€ 1,101	€ 1,268	€ 1,246
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | Wells	23.8	35.9	37
Suspended exploration wells pending final determination | fields including wells drilled over the last 12 months
Property, plant and equipment
Property, plant and equipment	€ 204	€ 175	€ 157
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | Wells	4.5	4	6.7
Suspended exploration wells pending final determination | fields for which the delineation campaign is in progress
Property, plant and equipment
Property, plant and equipment	€ 579	€ 567	€ 631
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | Wells	11.3	17.9	14.9
Suspended exploration wells pending final determination | fields including commercial discoveries that proceeds to sanctioning
Property, plant and equipment
Property, plant and equipment	€ 302	€ 359	€ 480
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | Wells	8	14	15.4
Suspended exploration wells pending final determination | within 1 year
Property, plant and equipment
Property, plant and equipment	€ 216	€ 175	€ 157
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | Wells	5	4	6.7
Suspended exploration wells pending final determination | between 1 and 3 years
Property, plant and equipment
Property, plant and equipment	€ 246	€ 269	€ 250
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | Wells	4.9	12.2	11
Suspended exploration wells pending final determination | beyond 3 years
Property, plant and equipment
Property, plant and equipment	€ 623	€ 657	€ 861
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | Wells	13.9	19.7	19.3

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Number of wells.

+ References

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The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2022-03-24
-Paragraph 73
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_a&doctype=Standard
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