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Other Financial Data (Details) - Schedule of Other Financial Data Other Than Accumulated Other Comprehensive Income - USD ($) $ in Millions | 12 Months Ended
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May 31, 2017 | May 31, 2016 | May 31, 2015
Schedule of Other Financial Data Other Than Accumulated Other Comprehensive Income [Abstract] |  |  |
Advertising expense | $ 121.0 | $ 127.3 | $ 129.7
Amortization of prepublication and production costs | 23.3 | 26.4 | 30.4
Foreign currency transaction gain (loss) | 1.0 | (0.5) | 0.1
Purchases related to contractual commitments for minimum print quantities | $ 0.0 | $ 0.0 | $ 0.0

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- Definition This element represents the amortization of Prepublication costs and production costs based on expected future revenues or earning of related revenues in future. + References No definition available. + Details
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- Definition The cash outflow for purchases related to contractual commitments relating to minimum print quantities. + References No definition available. + Details
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64836518&loc=d3e30700-110894 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64836518&loc=d3e30690-110894 + Details
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