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Taxes (Details) - Schedule for components for deferred income taxes - USD ($)
$ in Millions
May 31, 2021
May 31, 2020
Deferred tax assets:    
Tax uniform capitalization $ 8.6 $ 10.4
Prepublication expenses 0.6 0.8
Inventory reserves 19.3 10.3
Allowance for credit losses 2.8 2.9
Deferred revenue 13.5 0.0
Other reserves 19.9 18.0
Postretirement, post employment and pension obligations 3.1 5.3
Tax carryforwards 39.7 51.1
Lease Liabilities 23.7 25.2
Other 14.1 11.9
Gross deferred tax assets 145.3 135.9
Valuation allowance (23.1) (31.3)
Total deferred tax assets 122.2 104.6
Deferred tax liabilities:    
Depreciation and amortization (74.3) (65.8)
Lease Right of Use Assets (20.2) (24.4)
Other (2.3) (2.1)
Total deferred tax liability (96.8) (92.3)
Total net deferred tax assets $ 25.4 $ 12.3