XML 103 R96.htm IDEA: XBRL DOCUMENT v3.10.0.1
Financial Instruments - Summary of Derivatives Measured at Fair Value (Detail) - EUR (€)
€ in Millions
Jun. 30, 2018
Dec. 31, 2017
Disclosure of financial instruments measured at fair value [line items]    
Other financial assets-derivatives € 44 € 96
Other financial liabilities-derivatives 57 66
Level 1 of fair value hierarchy [member]    
Disclosure of financial instruments measured at fair value [line items]    
Other financial assets-derivatives 14 46
Other financial liabilities-derivatives 18 6
Level 2 of fair value hierarchy [member]    
Disclosure of financial instruments measured at fair value [line items]    
Other financial assets-derivatives 30 50
Other financial liabilities-derivatives € 39 € 60