Debentures - Change in Fair Value (Details) - USD ($) $ in Millions	3 Months Ended
	May 31, 2022	May 31, 2021
Debt Instrument [Line Items]
Debenture, Fair Value, beginning balance	$ 507
Debenture, Fair Value, ending balance	459
1.75% Debenture
Debt Instrument [Line Items]
Debenture, Fair Value, beginning balance	507
Debenture total fair value adjustment	(48)	$ (5)
Debenture, Fair Value, ending balance	$ 459