Acquisition, Integration and Restructuring Expenses | Global Business Optimization Program (Details) - Global Business Optimization Program [Member] - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 17,371	$ 42,541
Restructuring and Related Cost, Cost Incurred to Date	59,912
Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	70,000
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	80,000
Americas
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	7,882	12,095
Restructuring and Related Cost, Cost Incurred to Date	19,977
Americas | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	30,000
Americas | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	35,000
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	8,424	28,992
Restructuring and Related Cost, Cost Incurred to Date	37,416
Europe | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	40,000
Europe | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	45,000
Asia Pacific [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1,065	1,454
Restructuring and Related Cost, Cost Incurred to Date	2,519
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	11,967	26,427
Restructuring and Related Cost, Cost Incurred to Date	38,394
Professional Services [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	5,404	$ 16,114
Restructuring and Related Cost, Cost Incurred to Date	$ 21,518