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Expenses by Nature - Summary of Information about Expenses by Nature (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Expenses by nature [abstract]
Raw materials and consumables used	€ (3,561)	€ (3,197)	€ (2,792)
Employee benefit expenses	(927)	(907)	(876)
Energy costs	(140)	(138)	(140)
Sub-contractors	(92)	(99)	(108)
Freight out costs	(143)	(124)	(128)
Professional fees	(74)	(77)	(85)
Operating lease expenses	(31)	(27)	(27)
Depreciation and amortization	(197)	(171)	(155)
Other operating expenses	(271)	(229)	(186)
Other gains / (losses)-net	154	70	21
Total operating expenses	€ (5,282)	€ (4,899)	€ (4,476)

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Subcontractors expense.

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The amount of depreciation and amortisation expense. Depreciation and amortisation are the systematic allocations of depreciable amounts of assets over their useful lives.

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The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment.

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The amount of expense arising from the consumption of energy.

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The amount of miscellaneous other operating expenses. [Refer: Other operating income (expense)]

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The amount of all operating expenses.

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The amount of raw materials and consumables used in the production process or in the rendering of services. [Refer: Current raw materials]

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The amount of expense arising from transportation services.

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