Goodwill (Tables)

9 Months Ended

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