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Valuation and Qualifying Accounts and Reserves (Schedule II) (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
May 31, 2020 | May 31, 2019 | May 31, 2018
Allowance for Doubtful Accounts, Current |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at Beginning of Period |  | $ 54,748 | $ 46,344 | $ 44,138 |
Additions Charged to Selling, General and Administrative |  | 16,683 | 18,646 | 4,487 |
Acquisitions (Disposals) of Businesses and Reclassifications |  | (79) | (131) |  |
(Deductions) Additions | [1] | (15,505) | (10,111) | (2,281) |
Balance at End of Period |  | 55,847 | 54,748 | 46,344 |
Accrued Product Liability Reserves, Current |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at Beginning of Period |  | 11,739 | 12,900 | 14,932 |
Additions Charged to Selling, General and Administrative |  | 5,356 | 12,696 | 6,169 |
(Deductions) Additions | [2] | (6,637) | (13,857) | (8,201) |
Balance at End of Period |  | 10,458 | 11,739 | 12,900 |
Accrued Environmental Reserves, Current |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at Beginning of Period |  | 1,147 | 1,144 | 1,102 |
Additions Charged to Selling, General and Administrative |  | 1,168 | 875 | 413 |
(Deductions) Additions | [2] | (345) | (872) | (371) |
Balance at End of Period |  | 1,970 | 1,147 | 1,144 |
Accrued Product Liability Reserves, Noncurrent |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at Beginning of Period |  | 29,942 | 29,902 | 28,222 |
Additions Charged to Selling, General and Administrative |  | 15,042 | 8,301 | 16,581 |
(Deductions) Additions | [2] | (17,968) | (8,261) | (14,901) |
Balance at End of Period |  | 27,016 | 29,942 | 29,902 |
Accrued Environmental Reserves, Noncurrent |  |  |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at Beginning of Period |  | 4,211 | 3,571 | 1,747 |
Additions Charged to Selling, General and Administrative |  | 371 | 895 | 5,350 | [3]
(Deductions) Additions |  | (457) | (255) | (3,526) |
Balance at End of Period |  | $ 4,125 | $ 4,211 | $ 3,571 |
[1] | Uncollectible accounts written off, net of recoveries
[2] | Primarily claims paid during the year, net of insurance contributions
[3] | Approximately $1.7 million of the additions are reflected in the line item entitled, “Restructuring Expense,” in our Consolidated Statements of Income.

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