Acquisition, Integration and Restructuring Expenses | TS Acquisition, Integration and Restructuring Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses	$ 5,209	$ 13,297	$ 11,430	$ 46,522
TS
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses		562		28,179
TS | Restructuring Charges
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses		3,777		14,649
TS | IT Related Costs [Member]
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses		1,156		8,486
TS | Professional services
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses		839		4,406
TS | Transaction Related Costs [Member]
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses		315		1,193
TS | Other (income) expense
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses		(5,525)		(555)
Americas
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses		(900)		13,100
Americas | Restructuring Charges
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses		100		3,500
Europe
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses		13,300		31,300
Europe | Restructuring Charges
Acquisition and integration expenses [Line Items]
Acquisition, integration and restructuring expenses		$ 3,700		$ 11,100