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Financial Instruments Fair Value Risk - Summary of Fair Values of Financial Assets and Financial Liabilities (Detail) - EUR (€) € in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Financial assets |  |  |
Cash and cash equivalents | € 3,317 | € 3,382 |
Held-to-maturity investments | 163 | 142 |
Loans and receivables | 463 | 398 |
Available-for-sale financial assets | 564 | 509 |
Financial liabilities |  |  |
Bonds and other loans | (22,709) | (15,053) |
Derivatives | (421) | (185) |
Other financial liabilities | (177) |  |
Financial liabilities | (24,430) | (16,595) | € (14,643)
Derivatives [Member] |  |  |
Financial assets at fair value through profit or loss: |  |  |
Financial assets | 116 | 91 |
Other [Member] |  |  |
Financial assets at fair value through profit or loss: |  |  |
Financial assets | 139 | 132 |
Fair value [Member] |  |  |
Financial assets |  |  |
Cash and cash equivalents | 3,317 | 3,382 |
Held-to-maturity investments | 163 | 142 |
Loans and receivables | 463 | 398 |
Available-for-sale financial assets | 564 | 509 |
Financial assets at fair value through profit or loss: |  |  |
Financial assets | 4,762 | 4,654 |
Financial liabilities |  |  |
Preference shares |  | (125) |
Bank loans and overdrafts | (995) | (1,147) |
Bonds and other loans | (23,368) | (15,844) |
Finance lease creditors | (147) | (165) |
Derivatives | (421) | (185) |
Other financial liabilities | (177) |  |
Financial liabilities | (25,108) | (17,466) |
Fair value [Member] | Derivatives [Member] |  |  |
Financial assets at fair value through profit or loss: |  |  |
Financial assets at fair value through profit or loss | 116 | 91 |
Fair value [Member] | Other [Member] |  |  |
Financial assets at fair value through profit or loss: |  |  |
Financial assets | 139 | 132 |
Carrying amount [Member] |  |  |
Financial assets |  |  |
Cash and cash equivalents | 3,317 | 3,382 |
Held-to-maturity investments | 163 | 142 |
Loans and receivables | 463 | 398 |
Available-for-sale financial assets | 564 | 509 |
Financial assets at fair value through profit or loss: |  |  |
Financial assets | 4,762 | 4,654 |
Financial liabilities |  |  |
Preference shares |  | (68) |
Bank loans and overdrafts | (992) | (1,146) |
Bonds and other loans | (22,709) | (15,053) |
Finance lease creditors | (131) | (143) |
Derivatives | (421) | (185) |
Other financial liabilities | (177) |  |
Financial liabilities | (24,430) | (16,595) |
Carrying amount [Member] | Derivatives [Member] |  |  |
Financial assets at fair value through profit or loss: |  |  |
Financial assets at fair value through profit or loss | 116 | 91 |
Carrying amount [Member] | Other [Member] |  |  |
Financial assets at fair value through profit or loss: |  |  |
Financial assets | € 139 | € 132 |

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- Definition The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2016-01-13 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_8_a&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of non-derivative financial assets that are designated as available for sale or are not classified as (a) loans and receivables; (b) held-to-maturity investments; or (c) financial assets at fair value through profit or loss. [Refer: Derivative financial assets; Financial assets at fair value through profit or loss; Held-to-maturity investments] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2016-01-13 -Paragraph 8 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_8_d&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Financial liabilities; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2016-01-13 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_25&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of non-derivative financial assets with fixed or determinable payments that are not quoted in an active market, other than: (a) those that the entity intends to sell immediately or in the near term, which shall be classified as held for trading, and those that the entity, upon initial recognition, designates as at fair value through profit or loss; (b) those that the entity, upon initial recognition, designates as available for sale; or (c) those for which the holder may not recover substantially all of its initial investment, other than because of credit deterioration, which shall be classified as available for sale. An interest acquired in a pool of assets that are not loans or receivables (for example, an interest in a mutual fund or a similar fund) is not a loan or receivable. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2016-01-13 -Paragraph 8 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_8_c&doctype=Standard -URIDate 2016-03-31 + Details
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