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v3.20.2

Description of the Business, Basis of Presentation and Summary of Significant Accounting Policies (Details) $ in Millions | 12 Months Ended
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May 31, 2020 USD ($) segment | May 31, 2019 USD ($) | May 31, 2018 USD ($)
Property, Plant and Equipment [Line Items] |  |  |
Number of countries in which entity operates | 165 |  |
Allowance for doubtful accounts receivable | $ 19.9 | $ 11.6 |
Capitalized computer software, net | 52.3 | 43.9 |
Capitalized computer software, amortization expense | $ 22.2 | 25.4 | $ 16.3
Useful life of intangible assets | 5 years 8 months 12 days |  |
Royalty advances, net | $ 109.5 | 102.9 |
Reporting units subject to goodwill impairment | segment | 7 |  |
Advertising expense | $ 85.2 | $ 106.8 | $ 110.0
Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Initial term | 3 years |  |
Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Initial term | 10 years |  |
Building [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Depreciable life | 40 years |  |
Building Improvements [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Depreciable life | 25 years |  |
Capitalized Software [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Depreciable life | 3 years |  |
Capitalized Software [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Depreciable life | 7 years |  |
Furniture and Fixtures [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Depreciable life | 10 years |  |
Customer Lists [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of intangible assets | 5 years |  |
Customer Lists [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of intangible assets | 10 years |  |
Prepublication Costs [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of intangible assets | 2 years |  |
Prepublication Costs [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of intangible assets | 5 years |  |
Intellectual Property [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of intangible assets | 5 years |  |
Accounting Standards Update 2018-15 [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Capitalized costs | $ 11.9 |  |

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