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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

X

- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

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The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

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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]]

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The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

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