Goodwill And Intangible Assets (Schedule Of Intangible Assets) (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Nov. 25, 2019	Feb. 28, 2017	Jan. 31, 2020	Jan. 31, 2018	Jan. 31, 2019
Finite-Lived Intangible Assets
Gross carrying amount			$ 1,836,535		$ 1,611,631
Accumulated amortization			(741,859)		(660,773)
Net book value			1,094,676		950,858
Capitalized software and development costs
Finite-Lived Intangible Assets
Gross carrying amount			482,399		460,254
Accumulated amortization			(349,033)		(336,034)
Net book value			133,366		124,220
Customer and Vendor Relationship
Finite-Lived Intangible Assets
Gross carrying amount			1,252,393		1,063,471
Accumulated amortization			(328,878)		(265,593)
Net book value			923,515		797,878
Other Intangible Assets
Finite-Lived Intangible Assets
Gross carrying amount			101,743		87,906
Accumulated amortization			(63,948)		(59,146)
Net book value			37,795		$ 28,760
DLT
Finite-Lived Intangible Assets
Finite-lived Intangible Assets Acquired			226,400
DLT | Customer and Vendor Relationship
Finite-Lived Intangible Assets
Finite-lived Intangible Assets Acquired	$ 208,000		208,000
DLT | Trade Names [Member]
Finite-Lived Intangible Assets
Finite-lived Intangible Assets Acquired	$ 18,400		$ 18,400
TS
Finite-Lived Intangible Assets
Finite-lived Intangible Assets Acquired				$ 1,000,000
TS | Customer Relationships [Member]
Finite-Lived Intangible Assets
Finite-lived Intangible Assets Acquired		$ 875,000		875,000
TS | Capitalized software and development costs
Finite-Lived Intangible Assets
Finite-lived Intangible Assets Acquired				75,000
TS | Trade Names [Member]
Finite-Lived Intangible Assets
Finite-lived Intangible Assets Acquired		$ 44,000		$ 44,000