Acquisition, Integration and Restructuring Expenses | Global Business Optimization Restructuring Activity (Details) - Global Business Optimization Program $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 31, 2018 USD ($)	Jul. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 12,735	$ 18,343
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	5,605	8,874
Payments for Restructuring		1,407
Restructuring Reserve, Translation and Other Adjustment		(322)
Restructuring Reserve	7,145	7,145
Professional services
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	7,130	9,469
Payments for Restructuring		1,598
Restructuring Reserve, Translation and Other Adjustment		(85)
Restructuring Reserve	7,786	7,786
Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		18,343
Payments for Restructuring		3,005
Restructuring Reserve, Translation and Other Adjustment		(407)
Restructuring Reserve	$ 14,931	$ 14,931