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Acquisitions and Disposals - Summary of Net Assets Acquired and Total Consideration (Detail) - EUR (€) € in Millions | Dec. 31, 2017 | Nov. 01, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Disclosure of Detailed Information about Business Combination [Line Items] |  |  |  |
Intangible assets | € 2,610 |  |  |
Other non-current assets | 93 |  |  |
Trade and other receivables | 96 |  |  |
Other current assets | 249 |  |  |
Non-current liabilities | (488) |  |  |
Current liabilities | (137) |  |  |
Net assets acquired | 2,423 |  | € 929 | € 999
Non-controlling interest | (50) |  |  |
Goodwill | 16,881 |  | 17,624 |
Cash consideration | 4,825 |  |  |
Deferred consideration | 87 |  |  |
Total consideration | 4,912 |  | 2,069 |
Subsidiaries [Member] |  |  |  |
Disclosure of Detailed Information about Business Combination [Line Items] |  |  |  |
Goodwill | 2,539 |  | € 1,140 | € 1,012
Carver Korea [Member] |  |  |  |
Disclosure of Detailed Information about Business Combination [Line Items] |  |  |  |
Intangible assets | 1,520 |  |  |
Other non-current assets | 14 |  |  |
Trade and other receivables | 18 |  |  |
Other current assets | 150 |  |  |
Non-current liabilities | (369) |  |  |
Current liabilities | (52) |  |  |
Net assets acquired | 1,281 | € 1,281 |  |
Non-controlling interest | (27) |  |  |
Goodwill |  | 1,030 |  |
Cash consideration | 2,284 | € 2,284 |  |
Total consideration | 2,284 |  |  |
Carver Korea [Member] | Subsidiaries [Member] |  |  |  |
Disclosure of Detailed Information about Business Combination [Line Items] |  |  |  |
Goodwill | 1,030 |  |  |
Other Acquisition [Member] |  |  |  |
Disclosure of Detailed Information about Business Combination [Line Items] |  |  |  |
Intangible assets | 1,090 |  |  |
Other non-current assets | 79 |  |  |
Trade and other receivables | 78 |  |  |
Other current assets | 99 |  |  |
Non-current liabilities | (119) |  |  |
Current liabilities | (85) |  |  |
Net assets acquired | 1,142 |  |  |
Non-controlling interest | (23) |  |  |
Cash consideration | 2,541 |  |  |
Deferred consideration | 87 |  |  |
Total consideration | 2,628 |  |  |
Other Acquisition [Member] | Subsidiaries [Member] |  |  |  |
Disclosure of Detailed Information about Business Combination [Line Items] |  |  |  |
Goodwill | € 1,509 |  |  |

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