Segments of Business - Narrative (Details) $ in Millions	6 Months Ended
	Sep. 30, 2022 USD ($) country product segment business	Mar. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	4
Number of national brand medical-surgical products offered (more than) | product	285,000
International segment assets	$ 63,081	$ 63,298
International
Segment Reporting Information [Line Items]
International segment assets	$ 9,600
International | Europe
Segment Reporting Information [Line Items]
Number of countries in which entity segment operates | country	9
Number of business operations | business	2