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Revenue Recognition - Performance Obligations (Details)
$ in Millions
May 31, 2020
USD ($)
Revenue from Contract with Customer [Abstract]  
Remaining performance obligation $ 180
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-06-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, expected timing of satisfaction, period 1 year
Remaining performance obligation, percentage 88.00%