Leases (Maturities of Undiscounted Lease Liabilities) (Details) - USD ($) $ in Millions	Feb. 28, 2021	Feb. 29, 2020
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 36
Lessee, Operating Lease, Liability, Payments, Due Year Two	30
Lessee, Operating Lease, Liability, Payments, Due Year Three	22
Lessee, Operating Lease, Liability, Payments, Due Year Four	17
Lessee, Operating Lease, Liability, Payments, Due Year Five	12
Lessee, Operating Lease, Liability, Payments, Due after Year Five	16
Lessee, Operating Lease, Liability, Payments, Due, Total	133
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	10
Operating Lease, Liability	123	$ 151
Finance Lease, Liability, Payments, Due Next Twelve Months	0
Finance Lease, Liability, Payments, Due Year Two	0
Finance Lease, Liability, Payments, Due Year Three	0
Finance Lease, Liability, Payments, Due Year Four	0
Finance Lease, Liability, Payments, Due Year Five	0
Finance Lease, Liability, Payments, Due after Year Five	0
Finance Lease, Liability, Payment, Due, Total	0
Finance Lease, Liability, Undiscounted Excess Amount	0
Finance Lease, Liability, Total	$ 0	$ 1