Investments	9 Months Ended
Feb. 28, 2017
Investments, Debt and Equity Securities [Abstract]
Investments	Investments Investments at February 28, 2017 of $148.2 million include the cash surrender value of insurance policies of $127.0 million, equity method investments of $16.2 million, and cost method investments of $5.0 million. Investments at May 31, 2016 of $125.0 million include the cash surrender value of insurance policies of $108.1 million, equity method investments of $14.5 million and cost method investments of $2.4 million. Investments are generally evaluated for impairment on an annual basis or when indicators of impairment exist. For the nine months ended February 28, 2017 and February 29, 2016, no impairment losses were recorded.

Investments

9 Months Ended

Feb. 28, 2017

Investments, Debt and Equity Securities [Abstract]

Investments at February 28, 2017 of $148.2 million include the cash surrender value of insurance policies of $127.0 million, equity method investments of $16.2 million, and cost method investments of $5.0 million. Investments at May 31, 2016 of $125.0 million include the cash surrender value of insurance policies of $108.1 million, equity method investments of $14.5 million and cost method investments of $2.4 million.

Investments are generally evaluated for impairment on an annual basis or when indicators of impairment exist. For the nine months ended February 28, 2017 and February 29, 2016, no impairment losses were recorded.