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Changes in accounting policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Changes In Accounting Policies [Abstract] |
Disclosure And Detailed Information About Initial Effects And Adjustment On Financial Position Table [Text Block] | The breakdown of the abovementioned quantitative effects and reclassifications 24 , deriving from the initial application, as of January 1, 2018 25 , of IFRS 9 and IFRS 15, is as follows:
(€ million) |  |  |
Selected line items only |  | December 31, 2017 |  |  | Adoption of IFRS 9 |  |  | Adoption of IFRS 15 |  |  | Reclassifications |  |  | Total effect of the first application |  |  | As restated January 1, 2018 |
Current assets |  |  | 36,433 |  |  |  | (427 | ) |  |  | (372 | ) |  |  |  |  |  |  | (799 | ) |  |  | 35,634 |
- of which: Financial assets held for trading |  |  | 6,012 |  |  |  |  |  |  |  |  |  |  |  | 207 |  |  |  | 207 |  |  |  | 6,219 |
- of which: Financial assets available for sale |  |  | 207 |  |  |  |  |  |  |  |  |  |  |  | (207 | ) |  |  | (207 | ) |  |  |  |
- of which: Other current financial assets |  |  | 316 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 316 |
- of which: Trade and other receivables |  |  | 15,421 |  |  |  | (427 | ) |  |  | (372 | ) |  |  | (466 | ) |  |  | (1,265 | ) |  |  | 14,156 |
- of which: Other current assets |  |  | 1,573 |  |  |  |  |  |  |  |  |  |  |  | 466 |  |  |  | 466 |  |  |  | 2,039 |
Non-current assets |  |  | 78,172 |  |  |  | 721 |  |  |  | 247 |  |  |  |  |  |  |  | 968 |  |  |  | 79,140 |
- of which: Intangible assets |  |  | 2,925 |  |  |  |  |  |  |  | 87 |  |  |  |  |  |  |  | 87 |  |  |  | 3,012 |
- of which: Equity-accounted investments |  |  | 3,511 |  |  |  | (31 | ) |  |  | (6 | ) |  |  |  |  |  |  | (37 | ) |  |  | 3,474 |
- of which: Other investments |  |  | 219 |  |  |  | 681 |  |  |  |  |  |  |  |  |  |  |  | 681 |  |  |  | 900 |
- of which: Deferred tax assets |  |  | 4,078 |  |  |  | 71 |  |  |  | 166 |  |  |  |  |  |  |  | 237 |  |  |  | 4,315 |
Current liabilities |  |  | 24,735 |  |  |  |  |  |  |  | (113 | ) |  |  |  |  |  |  | (113 | ) |  |  | 24,622 |
- of which: Trade and other payables |  |  | 16,748 |  |  |  |  |  |  |  | (113 | ) |  |  | (1,330 | ) |  |  | (1,443 | ) |  |  | 15,305 |
- of which: Other current liabilities |  |  | 1,515 |  |  |  |  |  |  |  |  |  |  |  | 1,330 |  |  |  | 1,330 |  |  |  | 2,845 |
Non-current liabilities |  |  | 42,027 |  |  |  |  |  |  |  | 37 |  |  |  |  |  |  |  | 37 |  |  |  | 42,064 |
- of which: Deferred tax liabilities |  |  | 5,900 |  |  |  |  |  |  |  | 37 |  |  |  |  |  |  |  | 37 |  |  |  | 5,937 |
Shareholders’ equity |  |  | 48,079 |  |  |  | 294 |  |  |  | (49 | ) |  |  |  |  |  |  | 245 |  |  |  | 48,324 |
Disclosure Of Detailed Information of Reclassification Of Financial Assets In Accordance With IFRS 9 [Table Text Block] | For each kind of financial assets adjusted/reclassified upon the initial application of IFRS 9, the table below provides for the following information: (i) the original measurement category determined in accordance with IAS 39; (ii) the new measurement category determined in accordance with IFRS 9; (iii) the carrying amounts determined in accordance with IAS 39, recognised as of December 31, 2017, and the carrying amounts determined in accordance with IFRS 9 as of January 1, 2018:
|  |  |  |  |  | Carrying |  |  |  |  |  |  |  |  |  |  |  | Carrying |
|  | Classification |  | Classification |  | amount |  |  |  |  |  |  |  |  | Other |  |  | amount |
(€ million) |  | under IAS 39 |  | under IFRS 9 |  | under IAS 39 |  |  | Adjustments |  |  | Reclassifications |  |  | changes (*) |  |  | under IFRS 9 |
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets held for trading |  | Held for trading |  | FVTPL |  |  | 6,012 |  |  |  |  |  |  |  | 207 |  |  |  |  |  |  |  | 6,219 |
Financial assets available for sale |  | Available-for-sale |  | FVTPL |  |  | 207 |  |  |  |  |  |  |  | (207 | ) |  |  |  |  |  |  |  |
Trade and other receivables(**) |  | Financing receivables |  | Amortized cost |  |  | 15,421 |  |  |  | (427 | ) |  |  |  |  |  |  | (838 | ) |  |  | 14,156 |
Other investments |  | Cost |  | FVTOCI |  |  | 219 |  |  |  | 681 |  |  |  |  |  |  |  |  |  |  |  | 900 |
Total |  |  |  |  |  |  | 21,859 |  |  |  | 254 |  |  |  |  |  |  |  | (838 | ) |  |  | 21,275 |
| (*) | Other changes result from the effects related to a different classification under IFRS 15 of receivables for underlifting which have been reclassified as other assets in application of the sales method
| (**) | Compared to the values presented in the balance sheet at December 31, 2017, the item no longer includes financial receivables, which have been reclassified under the new item “Other current financial assets”

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