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	$ 36.0	$ 108.4	$ 58.1
Foreign	44.6	17.7	43.1
Income from continuing operations before income taxes	80.6	126.1	101.2
Provision for (benefit from) income taxes:
United States federal	27.4	43.1	33.2
State and local	13.8	(9.8)	(3.8)
Foreign	7.4	11.5	6.0
Tax expense	48.6	44.8	35.4
Current:
United States federal	3.2	2.3	0.8
State and local	0.7	2.2	0.7
Foreign	11.3	10.7	21.7
Total current income taxes	15.2	15.2	23.2
Deferred:
United States federal	32.6	76.0	60.1
State and local	22.2	(5.2)	(1.4)
Foreign	(1.7)	3.0	(14.4)
Total deferred income taxes	53.1	73.8	44.3
Benefits of operating loss carryforwards:	(19.7)	(44.2)	(32.1)
Tax expense	48.6	44.8	35.4
United States federal
Deferred:
Benefits of operating loss carryforwards:	(8.4)	(35.2)	(27.7)
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)