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Stock-Based Compensation (Stock-Based Compensation Costs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stock-Based Compensation
Restricted stock and restricted stock units	$ 7.1	$ 7.4	$ 7.3
Stock options, performance awards and other	1.3	1.9	1.6
Less: costs capitalized as part of inventory	(0.4)	(0.3)	(0.3)
Expense included in selling, general and administrative and advanced technology costs	8.0	9.0	8.6
Total after-tax expense	$ 5.2	$ 5.8	$ 5.6

X

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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- Definition

The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

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