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Taxation (Tables) | 6 Months Ended
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Jun. 30, 2019
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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 2019 |  |  | First Half 2018 Restated(a) |
€ million |  | Before tax |  |  | Tax (charge)/ credit |  |  | After tax |  |  | Before tax |  |  | Tax (charge)/ credit |  |  | After tax |
Gains/(losses) on |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity instruments at fair value through other comprehensive income |  |  | 16 |  |  |  | – |  |  |  | 16 |  |  |  | (4 | ) |  |  | – |  |  |  | (4 | )
Cash flow hedges |  |  | 89 |  |  |  | (6 | ) |  |  | 83 |  |  |  | 32 |  |  |  | 4 |  |  |  | 36 |
Remeasurements of defined benefit pension plans |  |  | 274 |  |  |  | (7 | ) |  |  | 267 |  |  |  | 206 |  |  |  | (64 | ) |  |  | 142 |
Currency retranslation gains/(losses) |  |  | 68 |  |  |  | (4 | ) |  |  | 64 |  |  |  | (756 | ) |  |  | 1 |  |  |  | (755 | )
Other comprehensive income |  |  | 447 |  |  |  | (17 | ) |  |  | 430 |  |  |  | (522 | ) |  |  | (59 | ) |  |  | (581 | )
(b) | Restated following adoption of IFRS 16. Refer note 1 and note 9.

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