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Capital and Funding - Summary of Consolidated Statement of Changes in Equity: Analysis of Other Reserves (Detail) - EUR (€) € in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of reserves within equity [abstract] |  |  |
Fair value reserves | € (194) | € (189) | € (113)
Equity instruments | 98 |  |
Cash flow hedges | (292) | (236) | (168)
Available-for-sale financial assets |  | 47 | 55
Currency retranslation of group companies - see following table | (4,764) | (3,927) | (3,034)
Adjustment on translation of PLC's ordinary capital at 31/9p = €0.16 | (150) | (164) | (164)
Capital redemption reserve | 32 | 32 | 32
Book value of treasury shares - see following table | (10,181) | (9,208) | (4,164)
Hedging gains/(losses) transferred to non-financial assets(a) | 71 |  |
Other | (100) | (177) |
Other reserves | € (15,286) | € (13,633) | € (7,443)

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- Definition A component of equity representing reserves within equity, not including retained earnings. [Refer: Retained earnings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_e&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition A component of equity representing the accumulated portion of gain (loss) on a hedging instrument that is determined to be an effective hedge for cash flow hedges. [Refer: Cash flow hedges [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_e&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 9 -IssueDate 2017-01-01 -Paragraph 6.5.11 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=9&date=2017-03-01&anchor=para_6.5.11&doctype=Standard -URIDate 2017-03-09 + Details
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