CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenues	$ 93,651	$ 77,215	$ 172,934	$ 151,698
Cost of sales	(90,403)	(74,146)	(166,534)	(145,607)
Gross profit	3,248	3,069	6,400	6,091
Selling, distribution, general, and administrative expenses	(2,503)	(2,092)	(4,504)	(3,962)
Claims and litigation charges, net	4	2	(108)	2
Restructuring, impairment, and related charges, net	(171)	(28)	(181)	(80)
Total operating expenses	(2,670)	(2,118)	(4,793)	(4,040)
Operating income	578	951	1,607	2,051
Other income, net	34	26	164	64
Interest expense	(78)	(61)	(153)	(108)
Income before income taxes	534	916	1,618	2,007
Income tax expense	(247)	(213)	(371)	(307)
Net income	287	703	1,247	1,700
Net income attributable to noncontrolling interests	(46)	(39)	(91)	(78)
Net income attributable to McKesson Corporation	$ 241	$ 664	$ 1,156	$ 1,622
Earnings per common share attributable to McKesson Corporation
Diluted (in usd per share)	$ 1.87	$ 4.92	$ 8.89	$ 11.95
Basic (in usd per share)	$ 1.88	$ 4.95	$ 8.94	$ 12.03
Weighted-average common shares outstanding
Diluted (in shares)	129.3	134.8	130.0	135.7
Basic (in shares)	128.7	134.1	129.3	134.8