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Goodwill (Tables) | 9 Months Ended
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Oct. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The following table summarizes the changes in the carrying amount of goodwill for the nine months ended October 31, 2017:
Balance as of January 31, 2017 | $ | 1,710.3 |
Less: accumulated impairment losses as of January 31, 2017 | (149.2 | )
Net balance as of January 31, 2017 | 1,561.1 |
Additions arising from acquisitions during the period | — |
Effect of foreign currency translation, purchase accounting adjustments, and other during the period | 27.6 |
Balance as of October 31, 2017 | $ | 1,588.7 |

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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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