XML 162 R117.htm IDEA: XBRL DOCUMENT v3.10.0.1
Other financial assets - Text Details (Detail) - EUR (€)
€ in Millions
2 Months Ended
Feb. 28, 2018
Dec. 31, 2018
Dec. 31, 2017
Other financial assets - Text Details (Detail) [Line Items]      
Increase (Decrease) in current financial assets € 434    
Other current financial assets   € 436 € 2
Combined Lumileds and Automotive Lighting businesses [Member]      
Other financial assets - Text Details (Detail) [Line Items]      
Non-current financial assets at fair value through other comprehensive income   € 112 € 243
Signify Member      
Other financial assets - Text Details (Detail) [Line Items]      
Interest in entity   16.50% 29.01%