XML 132 R118.htm IDEA: XBRL DOCUMENT v3.10.0.1
Leases - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Leases [Abstract]      
Rental expense attributed to operating leases $ 20.2 $ 20.9 $ 24.4