Consolidated Statement Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Cash flows from operating activities:
Cash received from customers	$ 35,335,867	$ 34,190,821
Cash paid to vendors and employees	(34,774,608)	(33,891,567)
Interest paid, net	(79,482)	(82,829)
Income taxes paid	(69,174)	(67,107)
Net cash provided by operating activities	412,603	149,318
Cash flows from investing activities:
Proceeds from sale of business, net of cash divested	0	8,985
Acquisition of businesses, net of cash acquired	0	(124,223)
Expenditures for property and equipment	(30,503)	(24,830)
Software and software development costs	(21,147)	(15,323)
Other	315	1,105
Net cash used in investing activities	(51,335)	(154,286)
Cash flows from financing activities:
Borrowings on long-term debt	300,000	0
Principal payments on long-term debt	(311,925)	(207,854)
Cash paid for debt issuance costs	(4,341)	0
Net borrowings (repayments) on revolving credit loans	15,035	(9,274)
Payments for employee tax withholdings on equity awards	(9,337)	(6,988)
Proceeds from the reissuance of treasury stock	1,450	1,322
Payments to Noncontrolling Interests	(7,553)	0
Payments for Repurchase of Common Stock	(166,992)	(43,798)
Proceeds from (Payments for) Other Financing Activities	529	0
Net cash used in financing activities	(183,134)	(266,592)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(13,111)	(37,589)
Net decrease in cash and cash equivalents	165,023	(309,149)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	964,146	646,479
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	799,123	955,628
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on disposal of subsidiary	(1,390)	(6,746)
Depreciation and amortization	112,726	119,641
Provision for losses on accounts receivable	19,176	11,545
Stock-based compensation expense	23,707	23,694
Accretion of debt discount and debt issuance costs	3,195	2,983
Deferred income taxes	4,577	(11,567)
Changes in operating assets and liabilities, net of acquisitions and disposition:
Accounts receivable	372,594	(309,390)
Inventories	113,168	(397,692)
Prepaid expenses and other assets	38,991	(3,720)
Accounts payable	(443,413)	474,214
Accrued expenses and other liabilities	(56,148)	22,575
Total adjustments	187,183	(74,463)
Net cash provided by operating activities	412,603	149,318
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 225,420	$ 223,781