Schedule - Valuation and Qualifying Accounts (Detail) (Allowance for Doubtful Accounts [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 17.2	$ 14.4	$ 18.8
Additions Charged (Credited) to Expense	7.1	4.5	(1.0)
Deductions to Reserve	(1.8)	(1.7)	(3.1)
Effects of Foreign Currency			(0.6)
Acquired Allowances	0.3		0.3
Balance at End of Period	$ 22.8	$ 17.2	$ 14.4