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Leases (Components of Operating Lease Expense) (Details) - USD ($)
$ in Millions
12 Months Ended
Feb. 28, 2021
Feb. 29, 2020
Leases [Abstract]    
Operating Lease, Cost $ 30 $ 33
Finance Lease, Right-of-Use Asset, Amortization 1 2
Finance Lease, Interest Expense 0 0
Finance Lease Cost $ 1 $ 2