Schedule II Valuation and Qualifying Accounts and Reserves Schedule II (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Allowance for doubtful accounts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 11.6	$ 12.4	$ 13.7
Expensed	15.6	7.0	9.5
Write-Offs and Other	7.3	7.8	10.8
Balance at End of Year	19.9	11.6	12.4
Reserve For Return [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	34.5	30.0	36.3
Expensed	76.7	67.2	54.5
Write-Offs and Other	67.7	62.7	60.8
Balance at End of Year	43.5	34.5	30.0
Reserves for obsolescence [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	72.9	67.5	71.9
Expensed	34.3	20.8	18.4
Write-Offs and Other	16.1	15.4	22.8
Balance at End of Year	91.1	72.9	67.5
Reserve for royalty advances [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	102.9	97.0	93.8
Expensed	8.1	6.8	4.1
Write-Offs and Other	1.5	0.9	0.9
Balance at End of Year	$ 109.5	$ 102.9	$ 97.0