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No definition available.

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For investments in debt and equity securities accounted for at cost, the excess of net sale proceeds over the carrying amount of investments disposed of during the period.

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No definition available.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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Amount of investment in equity method investee and investment in and advance to affiliate.

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Investments (Details) - USD ($) $ in Millions	12 Months Ended
Investments (Details) - USD ($) $ in Millions	May 31, 2018	May 31, 2017	May 31, 2016
Investments (Details) [Line Items]
Investments	$ 31.1	$ 28.6
Income (loss) from equity method investments	4.8	5.3	$ 3.5
Make Believe Ideas Limited (MBI) [Member]
Investments (Details) [Line Items]
Equity method investments	$ 10.6	8.6
Non-controlling interest held	48.50%
Children's Book Publishing and Distribution [Member]
Investments (Details) [Line Items]
Equity method investments	$ 20.5	20.0
Non-controlling interest held	26.20%
Other Investments [Member]
Investments (Details) [Line Items]
Investments	$ 0.1	0.1
Cost Method Investment in China [Member]
Investments (Details) [Line Items]
Gain on sale of cost method investments		$ 2.2