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Goodwill (Tables) | 3 Months Ended
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Apr. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The change in the carrying amount of goodwill by reporting unit during the three months ended April 30, 2015 is as follows:
| Platform Solutions and Emerging Business |  | Architecture, Engineering and Construction |  | Manufacturing |  | Media and Entertainment |  | Delcam |  | Total
Balances as of January 31, 2015 |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ | 327.5 |  |  | $ | 427.0 |  |  | $ | 422.7 |  |  | $ | 245.2 |  |  | $ | 183.0 |  |  | $ | 1,605.4 |
Accumulated impairment losses |  |  |  |  |  |  |  |  |  | (149.2 | ) |  | — |  |  | (149.2 | )
| 327.5 |  |  | 427.0 |  |  | 422.7 |  |  | 96.0 |  |  | 183.0 |  |  | 1,456.2 |
Addition arising from other acquisitions | 7.2 |  |  | 3.4 |  |  | — |  |  | 10.4 |  |  | — |  |  | 21.0 |
Effect of foreign currency translation, purchase accounting adjustments, and other | 1.9 |  |  | (0.4 | ) |  | (0.3 | ) |  | (0.1 | ) |  | (2.2 | ) |  | (1.1 | )
Balance as of April 30, 2015 |  |  |  |  |  |  |  |  |  |  |
Goodwill | 336.6 |  |  | 430.0 |  |  | 422.4 |  |  | 255.5 |  |  | 180.8 |  |  | 1,625.3 |
Accumulated impairment losses |  |  |  |  |  |  |  |  |  | (149.2 | ) |  | — |  |  | (149.2 | )
| $ | 336.6 |  |  | $ | 430.0 |  |  | $ | 422.4 |  |  | $ | 106.3 |  |  | $ | 180.8 |  |  | $ | 1,476.1 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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