XML 48 R35.htm IDEA: XBRL DOCUMENT v3.5.0.2
Other Financial Statement Information - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Inventory Disclosure [Abstract]          
Cost of inventories for certain materials using LIFO method $ 29.0   $ 29.0   $ 26.8
(Benefit) charge to earnings from LIFO inventory changes $ (0.2) $ (0.4) $ (0.3) $ (0.4)