Goodwill (Tables)

3 Months Ended

Apr. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table summarizes the changes in the carrying amount of goodwill for the three months ended April 30, 2018:

Balance as of January 31, 2018	$	1,769.4
Less: accumulated impairment losses as of January 31, 2018	(149.2		)
Net balance as of January 31, 2018	1,620.2
Effect of foreign currency translation	(15.3		)
Balance as of April 30, 2018	$	1,604.9