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Costs - Payroll and related costs (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Costs |  |  |
Wages and salaries | € 2,182 | € 2,193 | € 2,417
Social security contributions | 455 | 458 | 449
Cost related to employee benefit plans | 165 | 102 | 85
Other costs | 204 | 239 | 213
Payroll and related costs gross | 3,006 | 2,992 | 3,164
Capitalized direct costs associated with self-constructed assets - tangible assets | (111) | (118) | (152)
Capitalized direct costs associated with self-constructed assets - intangible assets | (7) | (11) | (16)
Payroll and related costs | € 2,888 | € 2,863 | € 2,996

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- Definition The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_102&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_99&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 104 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_104&doctype=Standard -URIDate 2021-03-24 + Details
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