SEGMENTS - Labor (Details)	12 Months Ended
May 31, 2020 employee
Segments
Number of employees	7,700
Workforce Subject to Collective Bargaining Arrangements \| Labor Force Concentration Risk
Segments
Concentration risk (as a percent)	23.00%
Workforce Subject to Collective Bargaining Arrangements Expiring within One Year \| Labor Force Concentration Risk
Segments
Concentration risk (as a percent)	19.00%
Non-US
Segments
Number of employees	800

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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