Capital Stock - Changes in Issued and Outstanding Common Shares (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Common Stock [Roll Forward]
Capital stock outstanding, Shares, Beginning Balance			582,157,203
Capital stock outstanding, Shares, Ending Balance	585,339,555		585,339,555
Common Stock, Amount [Roll Forward]
Stock-based compensation	$ 8	$ 9	$ 28	$ 23
Employee share purchase plan	$ 2	2	$ 4	6
Capital Stock and Additional Paid-in Capital
Common Stock [Roll Forward]
Capital stock outstanding, Shares, Beginning Balance			582,157,000
Exercise of stock options			92,000
Common shares issued for restricted share unit settlements			2,054,000
Common shares issued for employee share purchase plan			1,037,000
Capital stock outstanding, Shares, Ending Balance	585,340,000		585,340,000
Common Stock, Amount [Roll Forward]
Common Stock, Value, Outstanding			$ 2,909
Stock-based compensation	$ 8	9	28	23
Employee share purchase plan	2	$ 2	4	$ 6
Common Stock, Value, Outstanding	$ 2,941		$ 2,941