XML 133 R119.htm IDEA: XBRL DOCUMENT v3.3.1.900
Contingencies - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Valuation and Qualifying Accounts Disclosure [Line Items]    
Accruals, relating to environmental compliance and clean up $ 2.8 $ 2.8