Consolidated Statement Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Cash flows from operating activities:
Cash received from customers	$ 22,873,693	$ 19,826,856
Cash paid to vendors and employees	(22,793,148)	(19,356,918)
Interest paid, net	(48,829)	(32,425)
Income taxes paid	(37,179)	(66,066)
Net cash (used in) provided by operating activities	(5,463)	371,447
Cash flows from investing activities:
Proceeds from sale of business, net of cash divested	8,985	0
Acquisition of businesses, net of cash acquired	(2,818)	(2,249,344)
Expenditures for property and equipment	(14,131)	(12,613)
Software and software development costs	(8,592)	(29,200)
Other	1,096	(899)
Net cash used in investing activities	(15,460)	(2,292,056)
Cash flows from financing activities:
Borrowings on long-term debt	0	1,008,148
Principal payments on long-term debt	(105,845)	(210,946)
Cash paid for debt issuance costs	0	(5,121)
Net repayments on revolving credit loans	(8,700)	(18,786)
Payments for employee tax withholdings on equity awards	(6,702)	(5,686)
Proceeds from the reissuance of treasury stock	920	694
Net cash (used in) provided by financing activities	(120,327)	768,303
Effect of exchange rate changes on cash and cash equivalents	(21,519)	59,982
Net decrease in cash and cash equivalents	(162,769)	(1,092,324)
Cash and cash equivalents at beginning of year	955,628	2,125,591
Cash and cash equivalents at end of period	792,859	1,033,267
Reconciliation of net income to net cash (used in) provided by operating activities:
Net income	109,565	78,113
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Gain on disposal of subsidiary	6,717	0
Depreciation and amortization	80,399	70,573
Provision for losses on accounts receivable	6,270	7,437
Stock-based compensation expense	15,555	12,892
Accretion of debt discount and debt issuance costs	756	1,174
Deferred Income Tax Expense (Benefit)	(11,396)	561
Changes in operating assets and liabilities, net of acquisitions and disposition:
Accounts receivable	602,579	91,589
Inventories	(166,800)	(236,879)
Prepaid expenses and other assets	(39,131)	(21,378)
Accounts payable	(486,900)	413,745
Accrued expenses and other liabilities	(109,643)	(46,380)
Total adjustments	(115,028)	293,334
Net cash (used in) provided by operating activities	(5,463)	371,447
Supplemental schedule of non-cash investing activities:
Issuance of stock to acquire business	$ 0	$ 247,232