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Operating Costs and Non-underlying Items - Summary of Other Operating Income Expense (Detail) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Gross Profit And Operating Costs [Line Items] |  |  |
Staff costs | € (6,712) | € (6,523) | € (6,555)
Raw and packaging materials and goods purchased for resale | (21,579) | (21,122) | (21,543)
Amortisation of finite-life intangible assets and software | (365) | (310) | (273)
Depreciation of property, plant and equipment | (1,173) | (1,154) | (1,097)
Exchange gains/(losses) | (214) | (209) | (87)
Lease rentals | (557) | (531) | (534)
Minimum operating lease payments | (568) | (536) | (546)
Less: Sub-lease income relating to operating lease agreements | 11 | 5 | 12
On underlying transactions [member] |  |  |
Gross Profit And Operating Costs [Line Items] |  |  |
Exchange gains/(losses) | (51) | (28) | (118)
On covering forward contracts [member] |  |  |
Gross Profit And Operating Costs [Line Items] |  |  |
Exchange gains/(losses) | € (163) | € (181) | € 31

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