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Capital and Funding - Summary of Financial Liabilities (Parenthetical) (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial liabilities [Abstract]
Secured liabilities	€ 1	€ 2

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- References

No definition available.

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- Definition

Secured liabilities.

+ References

No definition available.

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