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Other information (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Notes And Other Explanatory Information Explanatory [Abstract] |
Disclosure of detailed information about supplemental cash flow information [table text block] | Supplemental cash flow information
(€ million) |  |  | 2018 |  |  | 2017 |  |  | 2016 |
Investment in consolidated subsidiaries and businesses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current assets |  |  |  |  | 44 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets |  |  |  |  | 198 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net borrowings |  |  |  |  | 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and non-current liabilities |  |  |  |  | (47) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net effect of investments |  |  |  |  | 206 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of investments held before the acquisition of control |  |  |  |  | (50) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on a bargain purchase |  |  |  |  | (8) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  | 148 |  |  |  |  |  |  |  |  |  |  |  |  |  |
less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | (29) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in consolidated subsidiaries and businesses net of cash and cash equivalent acquired |  |  |  |  | 119 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of consolidated subsidiaries and businesses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current assets |  |  |  |  | 328 |  |  |  |  |  | 166 |  |  |  |  |  | 6,526 |  |
Non-current assets |  |  |  |  | 5,079 |  |  |  |  |  | 814 |  |  |  |  |  | 8,615 |  |
Net borrowings |  |  |  |  | 785 |  |  |  |  |  | (252) |  |  |  |  |  | (5,415) |  |
Current and non-current liabilities |  |  |  |  | (3,470) |  |  |  |  |  | (205) |  |  |  |  |  | (6,334) |  |
Net effect of disposals |  |  |  |  | 2,722 |  |  |  |  |  | 523 |  |  |  |  |  | 3,392 |  |
Reclassification of foreign currency translation differences among other items of OCI |  |  |  |  | 113 |  |  |  |  |  |  |  |  |  |  |  | 7 |  |
Fair value of share capital held after the sale of control |  |  |  |  | (3,498) |  |  |  |  |  |  |  |  |  |  |  | (1,006) |  |
Fair value valuation for business combination |  |  |  |  | 889 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on disposal |  |  |  |  | 13 |  |  |  |  |  | 2,148 |  |  |  |  |  | 11 |  |
Non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,872) |  |
Selling price |  |  |  |  | 239 |  |  |  |  |  | 2,671 |  |  |  |  |  | 532 |  |
less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | (286) |  |  |  |  |  | (9) |  |  |  |  |  | (894) |  |
Disposal of consolidated subsidiaries and businesses net of cash and cash equivalent divested |  |  |  |  | (47) |  |  |  |  |  | 2,662 |  |  |  |  |  | (362) |  |

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