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Restructuring and Related Charges, Activity for Restructuring and Reinvestment Program Liability (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2018 | Oct. 31, 2017
Activity for Restructuring and Reinvestment Program liability [Roll Forward] |  |  |  |
(Credits) charges | $ 9,996 | $ (1,406) | $ 3,910 | $ 24,323
Restructuring and Reinvestment Program [Member] |  |  |  |
Activity for Restructuring and Reinvestment Program liability [Roll Forward] |  |  |  |
Restructuring liability, beginning of period |  |  | 20,051 |
(Credits) charges | 9,996 | (1,406) | 3,910 | 24,323
Payments |  |  | (9,295) |
Foreign translation & reclassifications |  |  | (236) |
Restructuring liability, end of period | 14,430 |  | 14,430 |
Restructuring and Reinvestment Program [Member] | Severance [Member] |  |  |  |
Activity for Restructuring and Reinvestment Program liability [Roll Forward] |  |  |  |
Restructuring liability, beginning of period |  |  | 17,279 |
(Credits) charges | 8,672 | (1,455) | 2,894 | 23,266
Payments |  |  | (8,295) |
Foreign translation & reclassifications |  |  | (446) |
Restructuring liability, end of period | 11,432 |  | 11,432 |
Restructuring and Reinvestment Program [Member] | Process Reengineering Consulting [Member] |  |  |  |
Activity for Restructuring and Reinvestment Program liability [Roll Forward] |  |  |  |
Restructuring liability, beginning of period |  |  | 0 |
(Credits) charges | 90 | 0 | 225 | 1,521
Payments |  |  | (175) |
Foreign translation & reclassifications |  |  | 0 |
Restructuring liability, end of period | 50 |  | 50 |
Restructuring and Reinvestment Program [Member] | Other Activities [Member] |  |  |  |
Activity for Restructuring and Reinvestment Program liability [Roll Forward] |  |  |  |
Restructuring liability, beginning of period |  |  | 2,772 |
(Credits) charges | 1,234 | $ 49 | 791 | $ (464)
Payments |  |  | (825) |
Foreign translation & reclassifications |  |  | 210 |
Restructuring liability, end of period | 2,948 |  | 2,948 |
Restructuring and Reinvestment Program [Member] | Other Activities [Member] | Other Accrued Liabilities [Member] |  |  |  |
Activity for Restructuring and Reinvestment Program liability [Roll Forward] |  |  |  |
Restructuring liability, end of period | 1,200 |  | 1,200 |
Restructuring and Reinvestment Program [Member] | Other Activities [Member] | Other Long-Term Liabilities [Member] |  |  |  |
Activity for Restructuring and Reinvestment Program liability [Roll Forward] |  |  |  |
Restructuring liability, end of period | $ 1,700 |  | $ 1,700 |

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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