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Taxation (Tables) | 6 Months Ended
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Jun. 30, 2018
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Summary of Tax Effects of Components of Other Comprehensive Income | Tax effects of components of other comprehensive income were as follows:
|  | First Half 2018 |  |  | First Half 2017 |
€ million |  | Before tax |  |  | Tax (charge)/ credit |  |  | After tax |  |  | Before tax |  |  | Tax (charge)/ credit |  |  | After tax |
Gains/(losses) on(a): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity instruments at fair value through other comprehensive income |  |  | (4 | ) |  |  | – |  |  |  | (4 | ) |  |  | – |  |  |  | – |  |  |  | – |
Cash flow hedges |  |  | 32 |  |  |  | 4 |  |  |  | 36 |  |  |  | 74 |  |  |  | (11 | ) |  |  | 63 |
Other financial instruments |  |  | – |  |  |  | – |  |  |  | – |  |  |  | (11 | ) |  |  | (1 | ) |  |  | (12 | )
Remeasurements of defined benefit pension plans |  |  | 206 |  |  |  | (64 | ) |  |  | 142 |  |  |  | 751 |  |  |  | (110 | ) |  |  | 641 |
Currency retranslation gains/(losses) |  |  | (768 | ) |  |  | 1 |  |  |  | (767 | ) |  |  | (723 | ) |  |  | 29 |  |  |  | (694 | )
Other comprehensive income |  |  | (534 | ) |  |  | (59 | ) |  |  | (593 | ) |  |  | 91 |  |  |  | (93 | ) |  |  | (2 | )
(a) | Classification has changed following adoption of IFRS 9. See note 1 for further details.

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