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Valuation and Qualifying Accounts and Reserves (Schedule II) (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
May 31, 2017 | May 31, 2016 | May 31, 2015
Allowance for Doubtful Accounts, Current |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at Beginning of Period |  | $ 24,600 | $ 24,526 | $ 27,641 |
Additions Charged to Selling, General and Administrative |  | 13,747 | 8,692 | 4,929 |
Acquisitions (Disposals) of Businesses and Reclassifications |  |  |  | 1,715 |
(Deductions) Additions | [1] | 5,791 | (8,618) | (9,759) |
Balance at End of Period |  | 44,138 | 24,600 | 24,526 |
Accrued Product Liability Reserves, Current |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at Beginning of Period |  | 25,100 | 11,916 | 10,589 |
Additions Charged to Selling, General and Administrative |  | 5,262 | 13,848 | 1,151 |
Acquisitions (Disposals) of Businesses and Reclassifications |  |  |  | 579 |
(Deductions) Additions | [2] | (15,430) | (664) | (403) |
Balance at End of Period |  | 14,932 | 25,100 | 11,916 |
Accrued Loss Reserves, Current |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at Beginning of Period |  | 1,053 | 1,383 | 2,731 |
Additions Charged to Selling, General and Administrative |  | 636 | 230 | 937 |
Acquisitions (Disposals) of Businesses and Reclassifications |  | (322) |  | 1,113 | [3]
(Deductions) Additions | [2] | (265) | (560) | (3,398) |
Balance at End of Period |  | 1,102 | 1,053 | 1,383 |
Accrued Product Liability, Noncurrent |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at Beginning of Period |  | 29,045 | 29,768 | 29,653 |
Additions Charged to Selling, General and Administrative |  | 15,005 | 9,637 | 10,034 |
Acquisitions (Disposals) of Businesses and Reclassifications |  | 281 |  |  |
(Deductions) Additions | [2] | (16,109) | (10,360) | (9,919) |
Balance at End of Period |  | 28,222 | 29,045 | 29,768 |
Environmental Reserves, Noncurrent |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at Beginning of Period |  | 1,676 | 3,498 | 2,005 |
Additions Charged to Selling, General and Administrative |  | 404 | 730 | 1,715 |
Acquisitions (Disposals) of Businesses and Reclassifications |  | 328 |  | 1,370 | [3]
(Deductions) Additions | [2] | (661) | (2,552) | (1,592) |
Balance at End of Period |  | $ 1,747 | $ 1,676 | $ 3,498 |
[1] | Uncollectible accounts written off, net of recoveries
[2] | Primarily claims paid during the year, net of insurance contributions
[3] | Primarily transfers between current and noncurrent

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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