Schedule Of Transactions Affecting Valuation Allowance On Deferred Tax Assets (Detail) (Valuation Allowance of Deferred Tax Assets, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Valuation Allowance of Deferred Tax Assets
Valuation Allowance [Line Items]
Balance, beginning of year	$ 273.2	$ 259.5	$ 277.5
Current year expense (benefit)-net	28.2	2.4	(9.6)
Write-offs	(37.9)	(1.8)	(9.4)
Foreign exchange and other	10.1	13.1	1.0
Balance, end of year	$ 273.6	$ 273.2	$ 259.5