Income Taxes - Income before income taxes (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income from continuing operations before income taxes:
United States	$ 26.0	$ 87.2	$ 48.9
Foreign	44.6	17.7	43.1
Income from continuing operations before income taxes	70.6	104.9	92.0
Provision for (benefit from) income taxes:
United States federal	24.8	41.8	34.4
State and local	13.8	(9.6)	(3.6)
Foreign	7.4	11.5	6.0
Tax expense	46.0	43.7	36.8
Current:
United States federal	3.2	2.2	0.9
State and local	0.7	2.4	0.8
Foreign	11.3	10.7	21.7
Total current income taxes	15.2	15.3	23.4
Deferred:
United States federal	28.0	73.4	60.1
State and local	22.2	(5.2)	(1.3)
Foreign	(1.7)	3.0	(14.4)
Total deferred income taxes	48.5	71.2	44.4
Benefits of operating loss carryforwards:	(17.7)	(42.8)	(31.0)
Tax expense	46.0	43.7	36.8
United States federal
Deferred:
Benefits of operating loss carryforwards:	(6.4)	(33.8)	(26.6)
State and local
Deferred:
Benefits of operating loss carryforwards:	(9.1)	(6.8)	(3.1)
Foreign
Deferred:
Benefits of operating loss carryforwards:	$ (2.2)	$ (2.2)	$ (1.3)