Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Components of amortized intangible assets
Gross Carrying Amount	$ 335.7		$ 334.3
Accumulated Amortization	(137.6)		(133.1)
Amortization expense for intangible assets	3.9	4.6
Estimated amortization expense
Remainder of fiscal year	11.8
2014	15.7
2015	15.7
2016	15.6
2017	15.3
2018	15.1
Contract based
Components of amortized intangible assets
Gross Carrying Amount	21.1		21.0
Accumulated Amortization	(13.9)		(13.8)
Technology based
Components of amortized intangible assets
Gross Carrying Amount	91.4		91.3
Accumulated Amortization	(42.2)		(40.8)
Marketing related
Components of amortized intangible assets
Gross Carrying Amount	25.1		24.9
Accumulated Amortization	(14.6)		(14.4)
Customer based
Components of amortized intangible assets
Gross Carrying Amount	198.1		197.1
Accumulated Amortization	$ (66.9)		$ (64.1)