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Trade and Other Current Receivables - Summary of Aging of Trade Receivables (Detail) - EUR (€) € in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Aging Of Current Trade Receivables [line items] |  |
Total trade receivables | € 4,538 | € 3,599
Less impairment provision for trade receivables | (188) | (160)
Trade receivables | 4,350 | 3,439
Not overdue [Member] |  |
Aging Of Current Trade Receivables [line items] |  |
Trade receivables | 3,440 | 2,714
Past due less than three months [Member] |  |
Aging Of Current Trade Receivables [line items] |  |
Trade receivables | 747 | 621
Past due more than three months but less than six months [Member] |  |
Aging Of Current Trade Receivables [line items] |  |
Trade receivables | 132 | 95
Past due more than six months but less than one year [Member] |  |
Aging Of Current Trade Receivables [line items] |  |
Trade receivables | 74 | 59
Past due more than one year [Member] |  |
Aging Of Current Trade Receivables [line items] |  |
Trade receivables | € 145 | € 110

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