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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
 3 Months Ended 9 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Earnings Per Share Reconciliation [Abstract]        
Net income $ 293 $ 290 $ 867 $ 1,091
Weighted average number of shares outstanding, basic (in shares) 262 269 264 271
Dilutive potential common shares related to stock award plans (in shares) 3 2 2 1
Weighted-average common stock outstanding - diluted (in shares) 265 271 266 272
Basic (in dollars per share) $ 1.12 $ 1.08 $ 3.28 $ 4.03
Diluted (in dollars per share) $ 1.11 $ 1.07 $ 3.26 $ 4.01