Goodwill (Tables)

6 Months Ended

Jul. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill

The following table summarizes the changes in the carrying amount of goodwill for the six months ended July 31, 2019:

Balance as of January 31, 2019	$	2,600.0
Less: accumulated impairment losses as of January 31, 2019	(149.2		)
Net balance as of January 31, 2019	2,450.8
Effect of foreign currency translation and measurement period adjustments (1)	(19.0		)
Balance as of July 31, 2019	$	2,431.8

____________________ 

(1)     Measurement period adjustments reflect revisions made to the Company's preliminary determination of estimated fair value of assets and liabilities assumed during the six months ending July 31, 2019.