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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2013
Stock-Based Compensation  
Schedule of Stock-Based Compensation Costs
Three Months Ended
March 31,
2013
2012
(millions)
Total stock-based compensation costs:
Restricted stock and restricted stock units
$ 0.9 $ 1.2
Stock options, performance awards and other
0.1 0.3
Expense included in selling, general and administrative and advanced technology costs
$ 1.0 $ 1.5
Total recognized tax benefit
$ - $ -