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Taxation - Summary of Deferred Tax Assets and Liabilities (Detail) - EUR (€) € in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | € 1,085 | € 1,354 |
Liabilities | (1,913) | (2,061) |
Total | (828) | (707) | € (559)
More than 1 year [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | 730 | 1,157 |
Liabilities | (1,868) | (2,206) |
Total | (1,138) | (1,049) |
Pensions and similar obligations [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | 294 | 568 |
Liabilities | 22 | 198 |
Total | 316 | 766 | 557
Provisions and accruals [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | 465 | 579 |
Liabilities | 188 | 343 |
Total | 653 | 922 | 708
Goodwill and intangible assets [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | 86 | 2 |
Liabilities | (1,738) | (1,930) |
Total | (1,652) | (1,928) | (1,301)
Accelerated tax depreciation [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | (21) | (60) |
Liabilities | (658) | (810) |
Total | (679) | (870) | (752)
Tax losses [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | 125 | 128 |
Liabilities | 5 | 3 |
Total | 130 | 131 | 123
Fair value gains [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | 23 | 28 |
Liabilities | 77 | (35) |
Total | 100 | (7) | (25)
Fair value losses [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | 3 | 9 |
Liabilities | 21 | 20 |
Total | 24 | 29 | 16
Share-based payments [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | 74 | 44 |
Liabilities | 120 | 125 |
Total | 194 | 169 | 190
Other [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items] |  |  |
Assets | 36 | 56 |
Liabilities | 50 | 25 |
Total | € 86 | € 81 | € (75)

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