Income taxes (Tables)

9 Months Ended

Sep. 30, 2011

Income Tax Disclosure [Abstract]

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

		Three Months				Nine Months
		Ended September 30,				Ended September 30,
		2011		2010		2011		2010
Continuing operations
Provision for income taxes (in millions)	$	20.9		15.5		37.9		46.1
Effective tax rate		36.5	%	38.3	%	34.9	%	49.5	%