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Property, plant and equipment - Stratification of suspended wells (Details) € in Millions | Dec. 31, 2021 EUR (€) item | Dec. 31, 2020 EUR (€) item | Dec. 31, 2019 EUR (€) item | Dec. 31, 2018 EUR (€)
--- | --- | --- | --- | ---
Property, plant and equipment |  |  |  |
Property, plant and equipment | € 56,299 | € 53,943 | € 62,192 |
Suspended exploration wells pending final determination |  |  |  |
Property, plant and equipment |  |  |  |
Property, plant and equipment | € 1,101 | € 1,268 | € 1,246 | € 1,101
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | item | 35.9 | 37.0 | 40.5 |
Suspended exploration wells pending final determination | fields including wells drilled over the last 12 months |  |  |  |
Property, plant and equipment |  |  |  |
Property, plant and equipment | € 175 | € 157 | € 185 |
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | item | 4.0 | 6.7 | 7.7 |
Suspended exploration wells pending final determination | fields for which the delineation campaign is in progress |  |  |  |
Property, plant and equipment |  |  |  |
Property, plant and equipment | € 567 | € 631 | € 556 |
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | item | 17.9 | 14.9 | 11.3 |
Suspended exploration wells pending final determination | fields including commercial discoveries that proceeds to sanctioning |  |  |  |
Property, plant and equipment |  |  |  |
Property, plant and equipment | € 359 | € 480 | € 505 |
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | item | 14.0 | 15.4 | 21.5 |
Suspended exploration wells pending final determination | within 1 year |  |  |  |
Property, plant and equipment |  |  |  |
Property, plant and equipment | € 175 | € 157 | € 185 |
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | item | 4.0 | 6.7 | 7.7 |
Suspended exploration wells pending final determination | between 1 and 3 years |  |  |  |
Property, plant and equipment |  |  |  |
Property, plant and equipment | € 269 | € 250 | € 171 |
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | item | 12.2 | 11.0 | 6.4 |
Suspended exploration wells pending final determination | beyond 3 years |  |  |  |
Property, plant and equipment |  |  |  |
Property, plant and equipment | € 657 | € 861 | € 890 |
Costs capitalized and suspended for exploratory well activity, number of wells in Eni's interest | item | 19.7 | 19.3 | 26.4 |

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- Definition 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 2021-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_a&doctype=Standard -URIDate 2021-03-24 + Details
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