Segment and Geographic Information - Summarized Information Of Consolidated Revenues and Long Lived Tangible Assets Net Of Accumulated Depreciation (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information
Revenues	$ 326.3	$ 332.8	$ 350.2	$ 337.1	$ 304.5	$ 314.9	$ 320.9	$ 309.4	$ 1,346.4	$ 1,249.7	$ 1,145.6
Property, plant and equipment, net	247.5				289.2				247.5	289.2
UNITED STATES
Segment Reporting Information
Revenues									701.0	640.4	545.2
Property, plant and equipment, net	112.7				164.5				112.7	164.5
Europe
Segment Reporting Information
Revenues									459.3	427.6	434.2
Property, plant and equipment, net	105.5				94.2				105.5	94.2
Canada and Mexico
Segment Reporting Information
Revenues									186.1	181.7	166.2
Property, plant and equipment, net	29.3				30.5				29.3	30.5
International
Segment Reporting Information
Revenues									645.4	609.3	$ 600.4
Property, plant and equipment, net	$ 134.8				$ 124.7				$ 134.8	$ 124.7