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Shareholders' Equity - Summary of Other Reserves (Detail) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of revaluation reserve [Line Items] |  |  |
Beginning balance | € 149 | € (390) | € 1,347
Movement in foreign currency translation and net foreign investment hedging reserves | 302 | 513 | (1,800)
Disposal of a business | (1) | 36 | 7
Tax effect | (5) | (20) | 76
Equity movements of joint ventures | 8 | 8 | (15)
Equity movements of associates | 4 | 2 | (5)
Other |  | 1 |
Ending balance | 456 | 149 | (390)
Foreign currency translation reserve [member] |  |  |
Disclosure of revaluation reserve [Line Items] |  |  |
Beginning balance | 499 | (80) | 1,734
Movement in foreign currency translation and net foreign investment hedging reserves | 312 | 562 | (1,929)
Disposal of a business | (1) | 50 | 7
Tax effect | (10) | (32) | 108
Ending balance | 800 | 499 | (80)
Net foreign investment hedging reserve [member] |  |  |
Disclosure of revaluation reserve [Line Items] |  |  |
Beginning balance | (370) | (321) | (418)
Movement in foreign currency translation and net foreign investment hedging reserves | (10) | (46) | 129
Disposal of a business |  | (14) |
Tax effect | 5 | 12 | (32)
Ending balance | (374) | (370) | (321)
Equity movements of joint ventures and associates [member] |  |  |
Disclosure of revaluation reserve [Line Items] |  |  |
Beginning balance | 19 | 11 | 31
Movement in foreign currency translation and net foreign investment hedging reserves |  | (3) |
Equity movements of joint ventures | 8 | 8 | (15)
Equity movements of associates | 4 | 2 | (5)
Other |  | 1 |
Ending balance | € 31 | € 19 | € 11

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