Leases (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jul. 31, 2019 USD ($)	Jul. 31, 2019 USD ($)
Lessee, Operating Lease, Description [Abstract]
Transition package		true
Hindsight practical expedient		false
Option to extend		true
Lessee, operating lease, option to terminate		The exercise of lease renewal options is generally at the Company’s sole discretion. The exercise of lease termination options is generally by mutual agreement between the Company and the lessor.
Variable and short term cost	$ 2.7	$ 5.0
Minimum
Lessee, Operating Lease, Description [Abstract]
Operating lease, contract term	1 year	1 year
Renewal term	1 year	1 year
Maximum
Lessee, Operating Lease, Description [Abstract]
Operating lease, contract term	10 years	10 years
Renewal term	10 years	10 years