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Accumulated Other Comprehensive Income (Loss) - Schedule of AOCI Activity (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 31, 2019 | May 31, 2018 | May 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning balance | $ (55.7) | $ (94.2) |
Other comprehensive income (loss) before reclassifications | (4.7) | 3.6 |
Other comprehensive income (loss) | (4.0) | 38.5 |
Ending balance | (59.7) | (55.7) | $ (94.2)
Pension and postretirement adjustments, tax portion | 0.5 | 1.1 | 22.0
Foreign currency translation adjustments [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning balance | (41.9) | (45.3) |
Other comprehensive income (loss) before reclassifications | (5.2) | 3.4 |
Other comprehensive income (loss) | (5.2) | 3.4 |
Ending balance | (47.1) | (41.9) | (45.3)
Lump sum settlement charge [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from Accumulated other comprehensive income (loss) |  | 33.0 |
Recognized net actuarial loss [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from Accumulated other comprehensive income (loss) | 0.7 | 1.9 |
Service cost [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from Accumulated other comprehensive income (loss) |  | 0.0 |
Pension Plans [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning balance | (12.5) | (46.9) |
Other comprehensive income (loss) before reclassifications | (1.4) | (0.4) |
Other comprehensive income (loss) | (0.6) | 34.4 |
Ending balance | (13.1) | (12.5) | (46.9)
Pension Plans [Member] | Lump sum settlement charge [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from Accumulated other comprehensive income (loss) |  | 33.0 |
Pension Plans [Member] | Recognized net actuarial loss [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from Accumulated other comprehensive income (loss) | 0.8 | 1.8 |
Pension Plans [Member] | Service cost [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from Accumulated other comprehensive income (loss) |  | 0.0 |
Postretirement Benefits [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning balance | (1.3) | (2.0) |
Other comprehensive income (loss) before reclassifications | 1.9 | 0.6 |
Other comprehensive income (loss) | 1.8 | 0.7 |
Ending balance | 0.5 | (1.3) | $ (2.0)
Postretirement Benefits [Member] | Lump sum settlement charge [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from Accumulated other comprehensive income (loss) |  | 0.0 |
Postretirement Benefits [Member] | Recognized net actuarial loss [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from Accumulated other comprehensive income (loss) | $ (0.1) | 0.1 |
Postretirement Benefits [Member] | Service cost [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from Accumulated other comprehensive income (loss) |  | $ 0.0 |

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- Definition Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Accumulated Tax + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580 + Details
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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109228884&loc=d3e1436-108581 + Details
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