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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2013
Share-based Compensation [Abstract] |
Schedule of Stock-Based Compensation Costs |
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
| (millions)
Total stock-based compensation costs: |  |  |  |  |  |  |
Restricted stock and restricted stock units | $ | 0.4 |  |  | $ | 1.3 |  |  | $ | 1.3 |  |  | $ | 2.5 |
Stock options, performance awards and other | — |  |  | 0.2 |  |  | 0.1 |  |  | 0.5 |
Less: costs capitalized as part of inventory | — |  |  | (0.1 | ) |  | — |  |  | (0.1 | )
Expense included in selling, general and administrative and advanced technology costs | $ | 0.4 |  |  | $ | 1.4 |  |  | $ | 1.4 |  |  | $ | 2.9 |
Total recognized tax benefit | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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