Investments	9 Months Ended
	Feb. 28, 2021
Investments, Debt and Equity Securities [Abstract]
Investments	InvestmentsAt February 28, 2021, investments were $264.6 million and include the cash surrender value of insurance policies of $238.4 million, equity method investments of $23.0 million and cost method investments of $3.2 million. At May 31, 2020, investments were $214.8 million and include the cash surrender value of insurance policies of $192.7 million, equity method investments of $19.0 million and cost method investments of $3.1 million. Investments are generally evaluated for impairment on an annual basis or when indicators of impairment exist. For the three and nine months ended February 28, 2021 and February 29, 2020, no impairment losses were recorded.