Revenue and Segment Disclosures -Transaction price allocated to the remaining performance obligations (Details) $ in Millions	May 31, 2022 USD ($)
Transaction price allocated to the remaining performance obligations [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 228
Less than 12 months
Transaction price allocated to the remaining performance obligations [Line Items]
Revenue, Remaining Performance Obligation, Amount	191
12 to 24 months
Transaction price allocated to the remaining performance obligations [Line Items]
Revenue, Remaining Performance Obligation, Amount	27
After 24 months
Transaction price allocated to the remaining performance obligations [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 10