Debentures - Impact of Changes in Fair Value of Debentures (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Debt Instrument [Line Items]
Income associated with the change in fair value from non-credit components recorded in the consolidated statements of operations	$ 56	$ 110	$ 112	$ 47
1.75% Debenture
Debt Instrument [Line Items]
Income associated with the change in fair value from non-credit components recorded in the consolidated statements of operations	56	110	112	47
Income (charge) associated with the change in fair value from instrument-specific credit components recorded in AOCL	1	(1)	3	0
Debenture total fair value adjustment	$ 57	$ 109	$ 115	$ 47