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Financial liabilities (Details Textual) € in Millions, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 EUR (€) | Dec. 31, 2017 EUR (€) | Dec. 31, 2016 EUR (€) | Dec. 31, 2018 USD ($) | Dec. 31, 2015 EUR (€)
Disclosure Of Information on net borrowings [Line Items] |  |  |  |  |  |  |  |
Repayments of non-current borrowings | € 2,757 |  | € 2,973 |  | € 2,323 |  |  |
Borrowings, maturity | 18 months |  |  |  |  |  |  |
Debts Subjected to covenants | € 1,337 |  | 1,664 |  |  |  |  |
Borrowings | 25,865 |  | 24,707 |  |  |  |  |
Notional amount | 4,596 |  |  |  |  |  |  |
Financial liabilities, at fair value |  |  | 23,764 |  |  |  |  |
Foreign Currency Translation Differences Other Than Functional Currency | 314 |  |  |  |  |  |  |
Cash and cash equivalents | 10,836 | [1] | 7,363 | [1] | € 5,674 | [1] |  | € 5,209
Maximum Amount Drawn | 16,700 |  |  |  |  |  |  |
Bonds issued | 2,844 |  |  |  |  |  |  |
Uncommitted borrowing facilities [Member] |  |  |  |  |  |  |  |
Disclosure Of Information on net borrowings [Line Items] |  |  |  |  |  |  |  |
Undrawn borrowing facilities | 12,484 |  | 11,584 |  |  |  |  |
Committed [Member] |  |  |  |  |  |  |  |
Disclosure Of Information on net borrowings [Line Items] |  |  |  |  |  |  |  |
Undrawn borrowing facilities | € 5,214 |  | € 5,802 |  |  |  |  |
Bottom of range [member] |  |  |  |  |  |  |  |
Disclosure Of Information on net borrowings [Line Items] |  |  |  |  |  |  |  |
Discount rates used to measure fair value of financial debt | (0.20%) |  | (0.20%) |  |  |  | (0.20%) |
Top of range [member] |  |  |  |  |  |  |  |
Disclosure Of Information on net borrowings [Line Items] |  |  |  |  |  |  |  |
Discount rates used to measure fair value of financial debt | 2.90% |  | 2.50% |  |  |  | 2.90% |
Ordinary Bonds Issued [Member] |  |  |  |  |  |  |  |
Disclosure Of Information on net borrowings [Line Items] |  |  |  |  |  |  |  |
Borrowings |  |  | € 17,965 |  |  |  | $ 2,800 |
Euro Medium Term Notes [Member] |  |  |  |  |  |  |  |
Disclosure Of Information on net borrowings [Line Items] |  |  |  |  |  |  |  |
Borrowings | € 16,904 |  |  |  |  |  |  |
Maximum Amount Issuable | $ |  |  |  |  |  |  | $ 20,000 |
Other Bonds [Member] |  |  |  |  |  |  |  |
Disclosure Of Information on net borrowings [Line Items] |  |  |  |  |  |  |  |
Borrowings | 2,800 |  |  |  |  |  |  |
Long term debt and current portion of longterm debt [Member] |  |  |  |  |  |  |  |
Disclosure Of Information on net borrowings [Line Items] |  |  |  |  |  |  |  |
Borrowings | € 25,865 |  | € 24,707 |  |  |  |  |
[1] | Cash and cash equivalents as of December 31, 2018, include €19 million of cash and cash equivalents of consolidated subsidiaries held for sale that were reported in the item Assets held for sale in the balance sheet

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