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Earnings Per Share - Computation Of Basic Earnings And Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Earnings Per Share Reconciliation [Abstract]      
Net income $ 1,273 $ 802 $ 789
Weighted-average common stock outstanding - basic (in shares) 270 277 284
Dilutive potential common shares related to stock award plans (in shares) 2 1 2
Weighted average common stock outstanding - diluted (in shares) 272 278 286
Basic (in dollars per share) $ 4.71 $ 2.90 $ 2.78
Diluted (in dollars per share) $ 4.68 $ 2.88 $ 2.76