Restructuring Asset Impairment Charges and Other Items (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Restructuring cost and reserve (Textual) [Abstract]
Write-off of intangible asset	$ 10.5	$ 17.1
Restructuring Asset Impairment Charges and Other Items (Textual) [Abstract]
Sales and use tax related liability reversal	15.5
Cost associated with transition service agreements	12.2
Depreciation adjustments related to property reclassified from held for sale to held and used		1.6
Fixed asset write-off	2.2
Accrued litigation costs		4.4
Litigation costs	3.4
Gain on sale of land	6.4
Lease and contract terminations [Member]
Restructuring cost and reserve (Textual) [Abstract]
Restructuring and related activities, Completion date	Dec. 31, 2013
Employees severance and benefits [Member]
Restructuring cost and reserve (Textual) [Abstract]
Restructuring and related activities, Completion date	Mar. 31, 2012
Customer program cancellation [Member]
Restructuring cost and reserve (Textual) [Abstract]
Write-off of intangible asset	4.5
Intellectual property [Member]
Restructuring cost and reserve (Textual) [Abstract]
Write-off of intangible asset	$ 5.5