CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenues	$ 77,215	$ 70,157	$ 151,698	$ 137,311
Cost of sales	(74,146)	(67,062)	(145,607)	(131,193)
Gross profit	3,069	3,095	6,091	6,118
Selling, distribution, general, and administrative expenses	(2,092)	(1,950)	(3,962)	(3,909)
Claims and litigation charges, net	2	9	2	4
Restructuring, impairment, and related charges, net	(28)	(30)	(80)	(53)
Total operating expenses	(2,118)	(1,971)	(4,040)	(3,958)
Operating income	951	1,124	2,051	2,160
Other income, net	26	175	64	190
Interest expense	(61)	(55)	(108)	(100)
Income from continuing operations before income taxes	916	1,244	2,007	2,250
Income tax expense	(213)	(271)	(307)	(470)
Income from continuing operations	703	973	1,700	1,780
Loss from discontinued operations, net of tax	0	(6)	0	(4)
Net income	703	967	1,700	1,776
Net income attributable to noncontrolling interests	(39)	(41)	(78)	(82)
Net income attributable to McKesson Corporation	$ 664	$ 926	$ 1,622	$ 1,694
Diluted
Continuing operations (in usd per share)	$ 4.92	$ 6.46	$ 11.95	$ 11.71
Discontinued operations (in usd per share)	0	(0.04)	0	(0.03)
Total (in dollars per share)	4.92	6.42	11.95	11.68
Basic
Continuing operations (in usd per share)	4.95	6.51	12.03	11.81
Discontinued operations (in usd per share)	0	(0.04)	0	(0.02)
Total (in dollars per share)	$ 4.95	$ 6.47	$ 12.03	$ 11.79
Weighted-average common shares outstanding
Diluted (in usd per share)	134.8	144.1	135.7	145.0
Basic (in shares)	134.1	143.1	134.8	143.7