Consolidated Statements of Cash Flows (USD $) In Thousands	12 Months Ended
May 31, 2011	May 31, 2010	May 31, 2009
Cash Flows From Operating Activities:
Net Income	$ 203,168	$ 181,127	$ 119,616
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	52,385	61,823	62,379
Amortization	20,368	22,430	22,765
Net loss upon deconsolidation of SPHC		7,946
Goodwill and other intangible asset impairments			15,462
Other-than-temporary impairments on marketable securities	693	260	15,062
Deferred income taxes cash flow	7,708	32,485	2,468
Stock-based compensation expense	12,282	10,030	8,008
Other	(1,086)	(1,768)	(1,316)
Changes in assets and liabilities, net of effect from purchases and sales of businesses:
Decrease (increase) in receivables	(70,440)	(17,748)	181,617
Decrease (increase) in inventory	(71,523)	(15,059)	75,014
Decrease (increase) in prepaid expenses and other current and long-term assets	(22,645)	2,230	18,024
(Decrease) increase in accounts payable	55,896	19,638	(119,327)
(Decrease) increase in accrued compensation and benefits	19,564	7,206	(29,039)
(Decrease) increase in accrued loss reserves	(8,198)	(2,705)	5,167
(Decrease) increase in other accrued liabilities	28,235	42,079	(14,040)
Payments made for asbestos-related claims		(92,621)	(69,417)
Other	11,759	(53,417)	(25,448)
Cash From (Used For) Operating Activities	238,166	203,936	266,995
Cash Flows From Investing Activities:
Capital expenditures	(39,826)	(23,241)	(54,986)
Acquisition of businesses, net of cash acquired	(38,972)	(73,985)	(16,669)
Purchase of marketable securities	(92,060)	(105,364)	(75,410)
Proceeds from sales of marketable securities	77,035	93,972	65,862
Proceeds from sales of assets and businesses	1,301	1,892	852
Decrease in cash due to deconsolidation of SPHC		(18,568)
Other	(13,418)	(1,659)	(1,196)
Cash (Used For) Investing Activities	(105,940)	(126,953)	(81,547)
Cash Flows From Financing Activities:
Additions to long-term and short-term debt	200,499	314,059	56,816
Reductions of long-term and short-term debt	(24,502)	(319,642)	(51,412)
Cash dividends	(108,585)	(105,430)	(101,836)
Repurchase of stock	(21,811)		(45,360)
Exercise of stock options	12,116	14,667	3,188
Proceeds From Payments For Other Financing Activities	0	(2,283)	0
Cash (Used For) Financing Activities	57,717	(98,629)	(138,604)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	29,713	(16,386)	(24,708)
Net Change in Cash and Cash Equivalents	219,656	(38,032)	22,136
Cash and Cash Equivalents at Beginning of Period	215,355	253,387	231,251
Cash and Cash Equivalents at End of Period	435,011	215,355	253,387
Supplemental Cash Flow Information [Abstract]
Interest Paid	62,892	53,897	51,316
Income Taxes Paid	67,380	45,090	62,930
Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract]
Debt from business combinations	0	2,991	20
Issuance of stock for convertible-bond redemption			$ 150,612

The cash inflow associated with the aggregate amount received by the entity through additions to long-term or short-term debt.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets, combined with the component of interest expense comprised of the periodic charge against earnings over the life of the financing arrangement to which such costs relate. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

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The value of the stock converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

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The net change during the reporting period in the aggregate amount of potential expenses related to insuarance, legal settlement, environmental, warranty, product liability, and other current matters incurred but not yet paid.

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The net change in the reporting period in other operating obligations not otherwise defined in the taxonomy in addition to the aggregate unrealized foreign currency transaction gain or loss (pretax) included in determining net income for the reporting period. Foreign currency amount represents the aggregate of gains and losses on transactions that are unsettled as of the balance sheet date, which is therefore an adjustment to reconcile income (loss) from continuing operations to net cash provided by (used in) continuing operations. (Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting entity's financial statements. For certain entities, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains or losses may be disclosed as dealer gains or losses.)

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The net change during the reporting period in the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods as well as the net change in current and other long-term assets not otherwise defined.

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The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Payments made during the reporting period for asbestos-related bodily injury lawsuits, including payments to defend or settle claims, net of any associated lawsuit settlement income.

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The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. This element may also include the cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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The cash outflow associated with the aggregate amount paid by the entity to reduce long-term or short-term debt.

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The aggregate amount of adjustments to net income or loss necessary to remove the effects of all items whose cash effects are investing or financing cash flows. The aggregate amount also includes all noncash expenses and income items which reduce or increase net income and are thus added back or deducted when calculating cash provided by or used in operating activities.

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Represents the expense recognized during the period arising from share-based compensation arrangements (for example, shares of stock, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents.

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The net change between the beginning and ending balance of cash and cash equivalents.

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Reduction in cash due to no longer including the former subsidiary's cash in the consolidated entity's cash.

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Designated to encapsulate the entire footnote disclosure that gives information on the supplemental cash flow activities for noncash (or part noncash) transactions for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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This element represents the gain or loss recognized by the parent and included in its attributable portion of net income for the period due to deconsolidation of a subsidiary by other than a nonreciprocal transfer to owners, such as a spin-off. The gain or loss recognized and included in the net income attributable to the parent for the period is generally computed as the difference between: (a) the aggregate of: (1) the fair value of any consideration received; (2) the fair value of any retained noncontrolling investment in the former subsidiary at the date the subsidiary was deconsolidated; and (3) the carrying amount of any noncontrolling interest in the former subsidiary (including any accumulated other comprehensive income attributable to the noncontrolling interest) at the date the subsidiary was deconsolidated and (b) the carrying amount of the former subsidiary's assets and liabilities.

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The net amount of deferred income taxes and income tax credits less the tax benefit from exercise of stock options.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The effect of exchange rate changes on cash balances held in foreign currencies.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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The net change during the reporting period in the aggregate amount of obligations due within one year (or one business cycle). This may include trade payables, amounts due to related parties, royalties payable, and other obligations.

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The net change during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

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The net change during the reporting period in the aggregate amount of pension, postretirement, workers' compensation, and other similar obligations and liabilities.

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The net change during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.

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The net change during the reporting period in other expenses incurred but not yet paid. This element should be used when there is no other more specific or appropriate element.

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The amount of cash paid during the current period for interest owed on money borrowed; includes amount of interest capitalized

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This element represents the amount of loss recognized for other than temporary impairments of investments in debt and equity securities.

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The net cash inflow (outflow) from financing activity for the period.

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The net cash inflow (outflow) from investing activity.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities include all transactions and events that are not defined as investing or financing activities. Operating activities generally involve producing and delivering goods and providing services. Cash flows from operating activities are generally the cash effects of transactions and other events that enter into the determination of net income.

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The net cash inflow (outflow) associated with the sale or (acquisition) of a business segment during the period.

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The net cash outflow (inflow) from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash outflow to reacquire common stock during the period.

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The cash outflow from the entity's earnings to the shareholders.

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The cash outflow from purchases of trading, available-for-sale securities and held-to-maturity securities.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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The net cash inflow (outflow) from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (trading, held-to-maturity, or available-for-sale) during the period.

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The cash inflow associated with the amount received from holders exercising their stock options.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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