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Deferred tax assets and liabiities (Details Textual) - EUR (€) € in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure Of Deferred Tax Liabilities [Line Items] |  |
Carry-forward tax losses indefinitely | € 13,753 |
Deferred tax assets | 3,931 | € 4,078
Carry-forward tax losses | € 19,108 |
Foreign Subsidiaries [Member] |  |
Disclosure Of Deferred Tax Liabilities [Line Items] |  |
Average effective tax rate | 35.00% |
Italian Companies [Member] |  |
Disclosure Of Deferred Tax Liabilities [Line Items] |  |
Carry-forward tax losses | € 10,786 |
Accumulated write-downs of deferred tax assets | 4,133 |
Foreign Companies [Member] |  |
Disclosure Of Deferred Tax Liabilities [Line Items] |  |
Carry-forward tax losses | 8,322 |
Accumulated write-downs of deferred tax assets | € 1,608 |
Italian subsidiaries [Member] |  |
Disclosure Of Deferred Tax Liabilities [Line Items] |  |
Average effective tax rate | 24.00% |
Unused tax losses [member] |  |
Disclosure Of Deferred Tax Liabilities [Line Items] |  |
Deferred tax assets | € 2,615 | € 2,913

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- Definition The amount that represents the carry forward tax losses. + References No definition available. + Details
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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_g_i&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_o&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_56&doctype=Standard -URIDate 2018-03-16 + Details
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