Acquisition, Integration and Restructuring Expenses | TS Acquisition, Integration and Restructuring Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	$ 13,297	$ 30,117	$ 46,522	$ 72,183
TS
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	562	30,117	28,179	72,183
TS | Restructuring Charges
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	3,777	6,982	14,649	17,327
TS | IT Related Costs [Member]
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	1,156	4,586	8,486	6,356
TS | Professional services
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	839	10,932	4,406	21,069
TS | Transaction Related Costs [Member]
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	315	2,050	1,193	17,229
TS | Other Expense
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	(5,525)	5,567	(555)	10,202
Americas
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	(900)	14,300	13,100	44,400
Americas | Restructuring Charges
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	100	900	3,500	10,400
Europe
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	13,300	14,700	31,300	26,200
Europe | Restructuring Charges
Acquisition and integration expenses [Line Items]
Business Combination, Acquisition Related Costs	$ 3,700	$ 6,100	$ 11,100	$ 6,900