CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Cash Flows From Operating Activities:
Net income	$ 41,762	$ 145,183
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	41,858	38,800
Amortization	20,684	15,903
Impairment on investment in Kemrock	51,092
Estimated loss contingency, net of tax	52,635
Deferred income taxes	4,461	(3,025)
Stock-based compensation expense	12,354	9,873
Other	(1,166)	(6,127)
Changes in assets and liabilities, net of effect from purchases and sales of businesses:
Decrease in receivables	137,071	128,391
(Increase) in inventory	(73,323)	(25,399)
Decrease (increase) in prepaid expenses and other current and long-term assets	12,931	(1,115)
(Decrease) in accounts payable	(83,988)	(87,199)
(Decrease) in accrued compensation and benefits	(39,696)	(28,222)
Increase (decrease) in accrued loss reserves	6,305	(5,896)
(Decrease) in other accrued liabilities	(10,905)	(40,013)
Other	(1,213)	12,300
Cash From Operating Activities	170,862	153,454
Cash Flows From Investing Activities:
Capital expenditures	(45,651)	(34,438)
Acquisition of businesses, net of cash acquired	(396,951)	(151,180)
Purchase of marketable securities	(82,054)	(58,853)
Proceeds from sales of marketable securities	88,572	43,894
Other	1,338	(1,751)
Cash (Used For) Investing Activities	(434,746)	(202,328)
Cash Flows From Financing Activities:
Additions to long-term and short-term debt	318,994	22,148
Reductions of long-term and short-term debt	(45,247)	(39,484)
Cash dividends	(87,832)	(83,871)
Repurchase of stock	(2,329)	(6,574)
Other	3,750	6,151
Cash From (Used For) Financing Activities	187,336	(101,630)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	7,684	(12,329)
Net Change in Cash and Cash Equivalents	(68,864)	(162,833)
Cash and Cash Equivalents at Beginning of Period	315,968	435,011
Cash and Cash Equivalents at End of Period	$ 247,104	$ 272,178