Reconciliation Of Unrecognized Tax Benefits (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits [Line Items]
Unrecognized tax benefits at January 1	$ 9.1	$ 13.1	$ 24.6
Gross increases-tax positions in prior period	0.9	1.9	1.0
Gross decreases-tax positions in prior period	0	(3.2)	(5.5)
Settlements	(3.7)	(2.6)	(6.8)
Lapse of statute of limitations	(0.4)	(0.1)	(0.2)
Unrecognized tax benefits at December 31	$ 5.9	$ 9.1	$ 13.1