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Goodwill (Tables) | 6 Months Ended
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Jul. 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 periods ended July 31, 2017 and January 31, 2017:
| July 31, 2017 |  | January 31, 2017
Goodwill, beginning of the period (as of February 1, 2017 and February 1, 2016, respectively) | $ | 1,710.3 |  |  | $ | 1,684.2 |
Less: accumulated impairment losses, beginning of the period (as of February 1, 2017 and February 1, 2016, respectively) | (149.2 | ) |  | (149.2 | )
Net goodwill, beginning of the period (as of February 1, 2017 and February 1, 2016, respectively) | 1,561.1 |  |  | 1,535.0 |
Additions arising from acquisitions during the period | — |  |  | 62.8 |
Effect of foreign currency translation, purchase accounting adjustments, and other | 27.5 |  |  | (36.7 | )
Goodwill, end of the period | $ | 1,588.6 |  |  | $ | 1,561.1 |

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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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