Restructuring (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Dec. 31, 2010	Jun. 30, 2011 Restructuring Plan, 2010 [Member]	Jun. 30, 2011 Restructuring Plan, 2010 [Member]	Jun. 30, 2011 Restructuring Plan, 2008 [Member]	Jun. 30, 2011 Restructuring Plan, 2006 [Member]
Restructuring (Textuals) [Abstract]
Pre-tax restructuring charge	$ 10.6
Workforce reduction, positions	230
Restructuring charges paid		2.4	5.3
Restructuring reserve, Current		$ 3.5	$ 3.5	$ 0.7	$ 4.3

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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