Acquisition, Integration and Restructuring Expenses | Global Business Optimization Restructuring Activity (Details) - Global Business Optimization Program $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 31, 2018 USD ($)	Oct. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 13,124	$ 31,467
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	8,741	17,615
Payments for Restructuring		6,036
Restructuring Reserve, Translation and Other Adjustment		(605)
Restructuring Reserve	10,974	10,974
Professional services
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	4,383	13,852
Payments for Restructuring		4,046
Restructuring Reserve, Translation and Other Adjustment		(112)
Restructuring Reserve	9,694	9,694
Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		31,467
Payments for Restructuring		10,082
Restructuring Reserve, Translation and Other Adjustment		(717)
Restructuring Reserve	$ 20,668	$ 20,668