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Revenue and Segment Disclosures -Transaction price allocated to the remaining performance obligations (Details) - USD ($)
$ in Millions
12 Months Ended
Feb. 28, 2023
Feb. 28, 2022
Feb. 28, 2021
Transaction price allocated to the remaining performance obligations [Line Items]      
Contract with Customer, Performance Obligation Satisfied in Previous Period $ 1 $ 1 $ 2
Revenue, Remaining Performance Obligation, Amount 214    
Less than 12 months      
Transaction price allocated to the remaining performance obligations [Line Items]      
Revenue, Remaining Performance Obligation, Amount 169    
12 to 24 months      
Transaction price allocated to the remaining performance obligations [Line Items]      
Revenue, Remaining Performance Obligation, Amount 31    
After 24 months      
Transaction price allocated to the remaining performance obligations [Line Items]      
Revenue, Remaining Performance Obligation, Amount $ 14