Income taxes (Tables)

6 Months Ended

Jun. 30, 2012

Income Tax Disclosure [Abstract]

Schedule Of Components Of Income Tax Expense Benefit [TableText Block]

		Three Months				Six Months
		Ended June 30,				Ended June 30,
		2012		2011		2012		2011
Continuing operations
Provision (benefit) for income taxes (in millions)	$	(10.1)		5.6		6.1		17.0
Effective tax rate		(45.9)	%	35.9	%	9.8	%	33.2	%