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Treasury Risk Management - Impact of Interest Rate Swaps and Cross-Currency Swaps (Detail) - EUR (€) € in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure Of Impact Of Interest Rate Swaps And Cross Currency Swaps [Line Items] |  |
Cash and cash equivalents | € 3,230 | € 3,317
Current other financial assets | 874 | 770
Current financial liabilities | (3,235) | (7,968)
Non-current financial liabilities | (21,650) | (16,462)
Fixed and Floating Interest Rate [Member] |  |
Disclosure Of Impact Of Interest Rate Swaps And Cross Currency Swaps [Line Items] |  |
Cash and cash equivalents | 3,230 | 3,317
Current other financial assets | 874 | 770
Current financial liabilities | (3,235) | (7,968)
Non-current financial liabilities | (21,650) | (16,462)
Net debt | (20,781) | (20,343)
Fixed rate (weighted average amount of fixing for the following year) | € (21,586) | € (16,216)

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