Income taxes - Current income tax expense (Detail) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income taxes [Abstract]
Current year tax (expense) benefit	€ (275)	€ (165)	€ (121)
Prior year tax (expense) benefit	3	20	11
Current tax (expense) benefit	€ (272)	€ (145)	€ (110)

Adjustments of tax expense (income) recognised in the period for current tax of prior periods.

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- Definition

The amount of income taxes payable (recoverable) in respect of the taxable profit (tax loss) for a period.

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The amount of current tax expense (income) and adjustments for the current tax of prior periods. [Refer: Current tax expense (income); Adjustments for current tax of prior periods]

+ References

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No definition available.

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