Income Taxes - Changes in Uncertain Tax Positions (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Unrecognized tax benefits:
Amount beginning of year	$ 33.4	$ 23.0	$ 37.4
Net increase:
Tax positions taken in prior periods	0.5	1.1	0.5
Tax positions taken in current period	11.3	11.0	6.0
Settlements with taxing authorities—cash paid		(0.1)
Lapse due to applicable statute of limitations	3.4	(1.8)	(20.6)
Changes in currency exchange rates	(0.8)	0.2	(0.3)
Amount at end of year	47.9	33.4	23.0
Basic Management Inc And Landwell
Net increase:
Acquisition of BMI and Landwell	$ 0.1