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, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share Reconciliation [Abstract]
Net income (loss)	$ 204	$ 66	$ 814	$ 564
Weighted Average Number of Shares Outstanding, Basic	276	283	278	284
Dilutive potential common shares related to stock award plans and from assumed exercise of stock options	2	2	1	3
Weighted Average Number of Shares Outstanding, Diluted	278	285	279	287
Earnings Per Share, Basic	$ 0.74	$ 0.23	$ 2.93	$ 1.99
Earnings Per Share, Diluted	$ 0.73	$ 0.23	$ 2.92	$ 1.97