Debentures - Impact of Changes in Fair Value of Debentures (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Debt Instrument [Line Items]
Income (charge) associated with the change in fair value from non-credit components recorded in the consolidated statements of operations	$ 0	$ 13	$ 0	$ (3)
2020 Debentures
Debt Instrument [Line Items]
Income (charge) associated with the change in fair value from non-credit components recorded in the consolidated statements of operations	0	18	0	2
Realized charges associated with the change in fair value from credit components recorded in the consolidated statement of operations on redemption	0	(6)	0	(6)
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, before Tax	0	(6)	0	(6)
Debenture total fair value adjustment	$ 0	$ 18	$ 0	$ 2