Valuation And Qualifying Accounts And Reserves (Details) (Valuation allowance for deferred tax assets [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Valuation allowance for deferred tax assets [Member]
Valuation allowance for deferred tax assets
Balance at beginning of the period	$ 30.13	$ 21.27	$ 16.40
Charged to income
Charged to other accounts	(0.55)	8.86	4.87
Balance at end of the period	$ 29.58	$ 30.13	$ 21.27