Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash paid for interest:
Interest paid for continuing operations	$ 16.7		$ 3.4
Interest paid for discontinued operations		$ 0.8	0.5
Continuing Operations
Cash paid for income taxes:
Income taxes paid	$ 4.3	0.5	0.4
Discontinued Operations
Cash paid for income taxes:
Income taxes paid		$ 0.1	$ 0.2