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Statements of Consolidated Income (USD $) In Millions, except Share data in Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Net sales | $ 1,360.1 |  | $ 1,301.3 |  | $ 1,079.1 |
Cost of products sold: |  |  |  |  |  |
Cost of products sold, excluding depreciation and amortization and other items | 1,116.2 |  | 1,129.0 |  | 946.1 |
Unrealized (gains) losses on derivative instruments | (15.2) |  | 29.9 |  | 0.7 |
Restructuring benefits | 0 |  | (0.3) |  | (0.3) |
Depreciation and amortization | 26.5 |  | 25.2 |  | 19.8 |
Selling, administrative, research and development, and general | 62.2 |  | 62.7 |  | 67.7 |
Other operating charges (benefits), net | 4.5 |  | (0.2) |  | 4.0 |
Total costs and expenses | 1,194.2 |  | 1,246.3 |  | 1,038.0 |
Operating income | 165.9 |  | 55.0 |  | 41.1 |
Other (expense) income: |  |  |  |  |  |
Interest expense | (29.1) |  | (18.0) |  | (11.8) |
Other income (expense), net | 2.8 |  | 4.3 |  | (4.2) |
Income before income taxes | 139.6 |  | 41.3 |  | 25.1 |
Income tax provision | (53.8) |  | (16.2) |  | (13.1) |
Net income | $ 85.8 |  | $ 25.1 |  | $ 12.0 |
Earnings per common share, Basic: |  |  |  |  |  |
Net income per share | $ 4.49 |  | $ 1.32 |  | $ 0.61 |
Earnings per common share, Diluted: |  |  |  |  |  |
Net income per share1 | $ 4.45 | [1],[2] | $ 1.32 | [1],[2] | $ 0.61 | [1],[2]
Weighted-average number of common shares outstanding (in thousands): |  |  |  |  |  |
Basic | 19,115 | [3] | 18,979 | [3] | 19,377 | [3]
Diluted1 | 19,278 | [2] | 18,979 | [2] | 19,377 | [2]
[1] | Diluted weighted-average number of common shares outstanding and diluted earnings per share for 2012 is based on the treasury method. Diluted weighted-average number of common shares outstanding and diluted earnings per share for 2011 and 2010 are based on the two-class method (see Note 1 and Note 14).
[2] | The diluted weighted-average number of common shares outstanding and diluted earnings per share for 2012 were calculated using the treasury method. The diluted weighted-average number of common shares outstanding and diluted earnings per share for 2011 and 2010 were calculated using the two-class method (see Note 1).
[3] | The basic weighted-average number of common shares outstanding during the period excludes unvested share-based payment awards.

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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