XML 48 R39.htm IDEA: XBRL DOCUMENT v3.10.0.1
Debt (Details)
€ in Millions, £ in Millions, $ in Millions
9 Months Ended
Sep. 30, 2018
USD ($)
Jul. 31, 2018
GBP (£)
Jul. 31, 2018
EUR (€)
Debt Instruments [Abstract]      
Maximum borrowing capacity, secured loan $ 60    
Credit facility, borrowings outstanding $ 60    
LIBOR [Member]      
Debt Instruments [Abstract]      
Debt instrument, term of variable rate 1 month    
Basis spread on variable rate 0.75%    
Revolving Credit Facility [Member]      
Debt Instruments [Abstract]      
Amount borrowed   £ 50 € 45
Revolving Credit Facility [Member] | LIBOR [Member]      
Debt Instruments [Abstract]      
Basis spread on variable rate 1.30%