XML 385 R312.htm IDEA: XBRL DOCUMENT v3.20.1
Borrowings - Summary of Undrawn Committed Borrowings Facilities (Detail) - EUR (€)
€ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about borrowings [Line Items]    
Undrawn Borrowing Facilities € 3,403 € 3,680
Floating Interest Rate [member]    
Disclosure of detailed information about borrowings [Line Items]    
Undrawn Borrowing Facilities 3,403 3,680
Not later than 1 year [member] | Floating Interest Rate [member]    
Disclosure of detailed information about borrowings [Line Items]    
Undrawn Borrowing Facilities 516 260
> 12 months [member] | Floating Interest Rate [member]    
Disclosure of detailed information about borrowings [Line Items]    
Undrawn Borrowing Facilities € 2,887 € 3,420