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Provisions for employee benefits - Analysis by geographical area related to the main actuarial assumptions (Details) - Foreign defined benefit plan | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Minimum |  |
Statement |  |
Discount rate | 0.00% | 0.80%
Rate of compensation increase | 1.30% | 1.50%
Rate of price inflation | 0.80% | 0.80%
Life expectations on retirement at age 65 | 13 years | 13 years
Maximum |  |
Statement |  |
Discount rate | 13.70% | 18.00%
Rate of compensation increase | 12.50% | 16.50%
Rate of price inflation | 11.30% | 16.00%
Life expectations on retirement at age 65 | 25 years | 25 years
Euro Area | Minimum |  |
Statement |  |
Discount rate | 0.80% | 1.50%
Rate of compensation increase | 1.30% | 1.50%
Rate of price inflation | 1.30% | 1.50%
Life expectations on retirement at age 65 | 21 years | 21 years
Euro Area | Maximum |  |
Statement |  |
Discount rate | 1.00% | 1.90%
Rate of compensation increase | 3.00% | 3.00%
Rate of price inflation | 2.00% | 2.00%
Life expectations on retirement at age 65 | 22 years | 22 years
Rest of Europe | Minimum |  |
Statement |  |
Discount rate | 0.00% | 0.80%
Rate of compensation increase | 2.50% | 2.50%
Rate of price inflation | 0.80% | 0.80%
Life expectations on retirement at age 65 | 24 years | 23 years
Rest of Europe | Maximum |  |
Statement |  |
Discount rate | 2.00% | 2.90%
Rate of compensation increase | 3.60% | 3.80%
Rate of price inflation | 3.10% | 3.30%
Life expectations on retirement at age 65 | 25 years | 25 years
Africa | Minimum |  |
Statement |  |
Discount rate | 2.60% | 3.70%
Rate of compensation increase | 2.00% | 5.00%
Rate of price inflation | 2.60% | 3.70%
Life expectations on retirement at age 65 | 13 years | 13 years
Africa | Maximum |  |
Statement |  |
Discount rate | 13.70% | 18.00%
Rate of compensation increase | 12.50% | 16.50%
Rate of price inflation | 11.30% | 16.00%
Life expectations on retirement at age 65 | 17 years | 17 years
Other areas | Minimum |  |
Statement |  |
Discount rate | 7.30% | 8.00%
Rate of compensation increase | 10.00% | 10.00%
Rate of price inflation | 3.30% | 3.50%
Other areas | Maximum |  |
Statement |  |
Discount rate | 11.30% | 13.30%
Rate of compensation increase | 11.30% | 13.30%
Rate of price inflation | 5.00% | 5.00%

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- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_144&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The expected rate of inflation that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_144&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_144&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The life expectancy after retirement used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_144&doctype=Standard -URIDate 2019-03-27 + Details
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