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Other Income, Net (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jul. 31, 2022	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Other Income, Net
Interest income		$ 173	$ 118	$ 107
Equity in earnings, net		9	4	5
Net gains on investments in equity securities		58	(24)	106
Other, net		(38)	34	279
Total		202	132	497
Net gains (losses) on investments in equity securities		101	(24)	(36)
Gain on derivative termination				97
Operating Segments | U.S. Pharmaceutical
Other Income, Net
Equity in earnings, net		(43)
Gain from sale of equity method investment				142
Proceeds from sale of equity method investment	$ 179
Corporate
Other Income, Net
Other, net		(87)
Net gains (losses) on investments in equity securities		$ 101	$ (24)	(36)
Tax Receivable Agreement (“TRA”)
Other Income, Net
Gain for early termination of tax receivable agreement				$ 126

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