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Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Revenue |  |  |  |  |  |
Product revenue | $ 1,297 | [1] | $ 1,122 | [1] | $ 933 | [1]
Service revenue | 1,368 |  | 1,240 |  | 1,003 |
Total revenue | 2,665 |  | 2,362 |  | 1,936 |
Costs and operating expenses |  |  |  |  |  |
Cost of products | 416 |  | 381 |  | 306 |
Cost of services | 758 |  | 688 |  | 542 |
Selling, general and administrative expenses | 728 |  | 663 |  | 526 |
Research and development expenses | 183 |  | 174 |  | 147 |
Total costs and operating expenses | 2,085 |  | 1,906 |  | 1,521 |
Income from operations | 580 |  | 456 |  | 415 |
Other (expense) income, net | (2) |  | 25 |  | (1) |
Income before income taxes | 578 |  | 481 |  | 414 |
Income tax expense | 159 |  | 128 |  | 113 |
Net income | $ 419 |  | $ 353 |  | $ 301 |
Net income per common share |  |  |  |  |  |
Basic | $ 2.49 |  | $ 2.10 |  | $ 1.80 |
Diluted | $ 2.44 |  | $ 2.05 |  | $ 1.77 |
Weighted average common shares outstanding |  |  |  |  |  |
Basic | 168.2 |  | 168.1 |  | 167.4 |
Diluted | 171.7 |  | 171.9 |  | 170.4 |
[1] | Our data warehousing software and hardware products are often sold and delivered together in the form of a "node" of capacity as an integrated technology solution. Accordingly, it is impracticable to provide the breakdown of revenue from various types of software and hardware products.

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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Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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