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Commitments and Contingent Liabilities - Summary of Contingent Liabilities (Parenthetical) (Detail) - EUR (€) € in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Brazil [Member] |  |
Disclosure of contingent liabilities [Line Items] |  |
Corporate reorganisation tax assessment | € 2,092 | € 1,464

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Indirect tax relating to corporate reorganisation. + References No definition available. + Details
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- Details
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