Restructuring And Asset Impairment Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Restructuring and Asset Impairment Charges
Restructuring and asset impairment charges	$ 13.6	$ 2.5	$ 17.4	$ 2.5
Kenya operations
Restructuring and Asset Impairment Charges
Restructuring and asset impairment charges	10.0
Fixed asset impairment charge	6
Working capital adjustments	2
Additional restructuring costs and asset impairment charges in the second half of the year			12
Cumulative translation adjustment associated with Kenyan operations			7
Severance pay related to the termination of employees in Kenya	2
North American facilities
Restructuring and Asset Impairment Charges
Restructuring charges	4		7
Accelerated depreciation	3		6
Restructuring charges to be recognized in the second half of the year			$ 4