CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Feb. 29, 2012	Feb. 28, 2011
Cash Flows From Operating Activities:
Net income	$ 145,183	$ 129,690
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	38,800	39,482
Amortization	15,903	15,049
Deferred income taxes	(3,025)	5,831
Stock-based compensation expense	9,873	8,769
Other	(6,127)	(308)
Changes in assets and liabilities, net of effect from purchases and sales of businesses:
Decrease in receivables	128,391	98,554
(Increase) in inventory	(25,399)	(81,387)
(Increase) in prepaid expenses and other current and long-term assets	(1,115)	(15,564)
(Decrease) in accounts payable	(87,199)	(38,356)
(Decrease) in accrued compensation and benefits	(28,222)	(9,509)
(Decrease) in accrued loss reserves	(5,896)	(958)
(Decrease) increase in other accrued liabilities	(40,013)	25,284
Other	12,300	14,407
Cash From Operating Activities	153,454	190,984
Cash Flows From Investing Activities:
Capital expenditures	(34,438)	(21,737)
Acquisition of businesses, net of cash acquired	(151,180)	(38,972)
Purchase of marketable securities	(58,853)	(71,556)
Proceeds from sales of marketable securities	43,894	63,369
Other	(1,751)	2,347
Cash (Used For) Investing Activities	(202,328)	(66,549)
Cash Flows From Financing Activities:
Additions to long-term and short-term debt	22,148	37,831
Reductions of long-term and short-term debt	(39,484)	(30,739)
Cash dividends	(83,871)	(81,189)
Repurchase of stock	(6,574)	(21,759)
Exercise of stock options	6,151	8,053
Cash (Used For) Financing Activities	(101,630)	(87,803)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(12,329)	23,492
Net Change in Cash and Cash Equivalents	(162,833)	60,124
Cash and Cash Equivalents at Beginning of Period	435,011	215,355
Cash and Cash Equivalents at End of Period	$ 272,178	$ 275,479