Goodwill and Other Intangibles Resulting from Business Acquisitions (Details 1) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 318.4	$ 319.8
Accumulated Amortization	190.5	176.6
Net Carrying Amount	127.9	143.2
Customer relationships [Member]
Finite-Lived Intangible Assets
Gross Carrying Amount	232.4	233.2
Accumulated Amortization	128.8	117.2
Net Carrying Amount	103.6	116.0
Patents and Other Acquired Technology [Member]
Finite-Lived Intangible Assets
Gross Carrying Amount	49.0	49.0
Accumulated Amortization	31.9	29.7
Net Carrying Amount	17.1	19.3
Trade Names and Trademarks [Member]
Finite-Lived Intangible Assets
Gross Carrying Amount	24.8	25.4
Accumulated Amortization	20.9	21.5
Net Carrying Amount	3.9	3.9
Other Intangibles [Member]
Finite-Lived Intangible Assets
Gross Carrying Amount	12.2	12.2
Accumulated Amortization	8.9	8.2
Net Carrying Amount	$ 3.3	$ 4.0