Debt - Finance lease liabilities (Detail) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017
Debt - Text Details (Detail) [Line Items]
Future finance charge on finance lease, total	€ 357	€ 306
Minimum finance lease payments payable, at present value	28	24
Minimum finance lease payments payable	330	281
Later than five years [member]
Debt - Text Details (Detail) [Line Items]
Future finance charge on finance lease, total	52	29
Minimum finance lease payments payable, at present value	6	4
Minimum finance lease payments payable	46	24
Later than one year and not later than five years [member]
Debt - Text Details (Detail) [Line Items]
Future finance charge on finance lease, total	206	184
Minimum finance lease payments payable, at present value	16	14
Minimum finance lease payments payable	190	170
Not later than one year [member]
Debt - Text Details (Detail) [Line Items]
Future finance charge on finance lease, total	100	93
Minimum finance lease payments payable, at present value	6	6
Minimum finance lease payments payable	€ 94	€ 87

The amount representing the difference between the future minimum finance lease payments and their present value. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2019-01-01
-Name IAS
-Number 17
-IssueDate 2017-01-01
-Paragraph 31
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_31_b&doctype=Standard&book=B
-URIDate 2017-03-09

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- Definition

The amount of payments over the finance lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with any amounts guaranteed by the lessee or by a party related to the lessee.

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- Definition

The present value of minimum finance lease payments payable. [Refer: Minimum finance lease payments payable]

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