Consolidated Statement Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Cash flows from operating activities:
Cash received from customers	$ 47,836,136	$ 42,981,601	$ 29,427,357
Cash paid to vendors and employees	(47,263,258)	(41,668,923)	(28,663,998)
Interest paid, net	(97,293)	(86,544)	(22,020)
Income taxes paid	(95,450)	(131,632)	(84,272)
Net cash provided by operating activities	380,135	1,094,502	657,067
Cash flows from investing activities:
Proceeds from sale of subsidiaries	8,985	0	0
Acquisition of businesses, net of cash acquired	(124,223)	(2,249,849)	(2,916)
Expenditures for property and equipment	(40,995)	(192,235)	(24,971)
Software and software development costs	(20,419)	(39,702)	(14,364)
Other	4,943	2,567	(224)
Net cash used in investing activities	(171,709)	(2,479,219)	(42,475)
Cash flows from financing activities:
Borrowings on long-term debt	0	1,008,148	998,405
Principal payments on long-term debt	(208,591)	(861,394)	0
Cash paid for debt issuance costs	0	(6,348)	(21,581)
Net repayments on revolving credit loans	(11,288)	(16,028)	3,417
Payments for employee withholdings on equity awards	(7,102)	(6,027)	(4,479)
Proceeds from the reissuance of treasury stock	1,771	1,543	733
Repurchases of common stock	(107,025)	0	0
Net cash (used in) provided by financing activities	(332,235)	119,894	976,495
Effect of exchange rate changes on cash and cash equivalents	(32,696)	94,860	3,335
Net (decrease) increase in cash and cash equivalents	(156,505)	(1,169,963)	1,594,422
Cash and cash equivalents at beginning of year	955,628	2,125,591	531,169
Cash and cash equivalents at end of year	799,123	955,628	2,125,591
Reconciliation of net income to net cash provided by operating activities:
Net income	340,580	116,641	195,095
Adjustments to reconcile net income to net cash provided by operating activities:
Goodwill Impairment	47,434	0	0
Gain on disposal of subsidiary	(6,746)	0	0
Depreciation and amortization	158,997	150,046	54,437
Provision for losses on accounts receivable	9,903	19,788	4,680
Stock-based compensation expense	31,513	29,381	13,947
Accretion of debt discount and debt issuance costs	1,512	3,326	835
Deferred income taxes	(12,482)	(4,261)	(11,002)
Changes in operating assets and liabilities, net of acquisitions and disposition:
Accounts receivable	(512,385)	(632,809)	(117,788)
Inventories	(480,001)	(466,445)	(27,478)
Prepaid expenses and other assets	15,910	(6,748)	57,978
Accounts payable	852,369	1,704,305	474,059
Accrued expenses and other liabilities	(66,469)	181,278	12,304
Total adjustments	39,555	977,861	461,972
Net cash provided by operating activities	380,135	1,094,502	657,067
Stock Issued	$ 0	$ 247,232	$ 0