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v3.19.1

Shareholders' equity (Details 2) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 EUR (€) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 EUR (€)
Reserve of cash flow hedges [member] |  |  |
Disclosure Of Classes Of Share Capital Explanatory [Line Items] |  |  |
Reserve at beginning of the period | € 183 |  | € 189
Changes of the year | 283 |  | (45)
Reversal to Inventories Adjustments | (7) |  |
Reclassification adjustments | (468) |  | 39
Reserve at end of the period | (9) |  | 183
Reserve of cash flow hedges [member] | Gross Reserve [Member] |  |  |
Disclosure Of Classes Of Share Capital Explanatory [Line Items] |  |  |
Reserve at beginning of the period | 240 |  | 246
Changes of the year | 399 |  | (59)
Reversal to Inventories Adjustments | (10) |  |
Reclassification adjustments | (642) |  | 53
Reserve at end of the period | (13) |  | 240
Reserve of cash flow hedges [member] | Deferred Tax Liabilities [Member] |  |  |
Disclosure Of Classes Of Share Capital Explanatory [Line Items] |  |  |
Reserve at beginning of the period | (57) |  | (57)
Changes of the year | (116) |  | 14
Reversal to Inventories Adjustments | 3 |  |
Reclassification adjustments | 174 |  | (14)
Reserve at end of the period | 4 |  | (57)
Reserve of remeasurements of defined benefit plans [member] |  |  |
Disclosure Of Classes Of Share Capital Explanatory [Line Items] |  |  |
Reserve at beginning of the period | 114 |  | (112)
Changes of the year | (17) |  | (4)
Foreign currency translation differences |  |  | 2
Change in Scope of Consolidation | 1 |  |
Reserve at end of the period | 130 |  | 114
Reserve of remeasurements of defined benefit plans [member] | Gross Reserve [Member] |  |  |
Disclosure Of Classes Of Share Capital Explanatory [Line Items] |  |  |
Reserve at beginning of the period | (133) |  | (99)
Changes of the year | (15) |  | (33)
Foreign currency translation differences | 1 |  | (1)
Change in Scope of Consolidation | $ |  | $ 4 |
Reserve at end of the period | (143) |  | (133)
Reserve of remeasurements of defined benefit plans [member] | Deferred Tax Liabilities [Member] |  |  |
Disclosure Of Classes Of Share Capital Explanatory [Line Items] |  |  |
Reserve at beginning of the period | 19 |  | (13)
Changes of the year | (2) |  | 29
Foreign currency translation differences | (1) |  | 3
Change in Scope of Consolidation | $ |  | $ (3) |
Reserve at end of the period | 13 |  | 19
Reserve of gains and losses from investments in equity instruments [member] |  |  |
Disclosure Of Classes Of Share Capital Explanatory [Line Items] |  |  |
Reserve at beginning of the period | 90 |  | 21
Changes of the year | (24) |  | 69
Reserve at end of the period | 66 |  | € 90
Investments valued at fair value [Member] |  |  |
Disclosure Of Classes Of Share Capital Explanatory [Line Items] |  |  |
Changes of the year | 15 |  |
Reserve at end of the period | € 15 |  |

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