Earnings Per Share - Computation Of Basic Earnings And Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share Reconciliation [Abstract]
Net income	$ 290	$ 204	$ 1,091	$ 814
Weighted average number of shares outstanding, basic (in shares)	269	276	271	278
Dilutive potential common shares related to stock award plans (in shares)	2	2	1	1
Weighted-average common stock outstanding - diluted (in shares)	271	278	272	279
Basic (in dollars per share)	$ 1.08	$ 0.74	$ 4.03	$ 2.93
Diluted (in dollars per share)	$ 1.07	$ 0.73	$ 4.01	$ 2.92