XML 120 R89.htm IDEA: XBRL DOCUMENT v3.10.0.1
Trade and Other Receivables, Net - Activity Related to Allowance for Doubtful Accounts (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Receivables [Abstract]      
Balance at beginning of year $ 1.8 $ 1.1 $ 1.1
Provision for doubtful accounts 0.2 1.1 0.6
Charge-offs, net of recoveries (0.7) (0.4) (0.6)
Balance at end of year $ 1.3 $ 1.8 $ 1.1