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Other Non-current Assets (Details) - USD ($)
$ in Millions
May 31, 2020
Jun. 01, 2019
May 31, 2019
Other Non-current Assets      
Contract assets $ 22.4   $ 17.0
Investments in joint ventures 17.8   12.3
Cash surrender value of life insurance 15.6   15.6
Assets under deferred compensation plan 13.1   10.4
License fees 4.1   7.2
Other 8.5   15.0
Other non-current assets $ 81.5 $ 75.7 $ 77.5