CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenues	$ 70,157	$ 66,576	$ 137,311	$ 129,250
Cost of sales	(67,062)	(63,224)	(131,193)	(122,866)
Gross profit	3,095	3,352	6,118	6,384
Selling, distribution, general, and administrative expenses	(1,950)	(2,669)	(3,909)	(4,901)
Claims and litigation charges, net	9	(112)	4	(186)
Restructuring, Settlement and Impairment Provisions	(30)	(32)	(53)	(190)
Total operating expenses	(1,971)	(2,813)	(3,958)	(5,277)
Operating income	1,124	539	2,160	1,107
Other income, net	175	139	190	182
Loss on debt extinguishment	0	(191)	0	(191)
Interest expense	(55)	(45)	(100)	(94)
Income from continuing operations before income taxes	1,244	442	2,250	1,004
Income tax expense	(271)	(132)	(470)	(158)
Income from continuing operations	973	310	1,780	846
Loss from discontinued operations, net of tax	(6)	0	(4)	(3)
Net income	967	310	1,776	843
Net income attributable to noncontrolling interests	(41)	(43)	(82)	(90)
Net income attributable to McKesson Corporation	$ 926	$ 267	$ 1,694	$ 753
Diluted
Continuing operations (in usd per share)	$ 6.46	$ 1.71	$ 11.71	$ 4.82
Discontinued operations (in usd per share)	(0.04)	0	(0.03)	(0.02)
Total (in dollars per share)	6.42	1.71	11.68	4.80
Basic
Continuing operations (in usd per share)	6.51	1.73	11.81	4.87
Discontinued operations (in usd per share)	(0.04)	0	(0.02)	(0.02)
Total (in dollars per share)	$ 6.47	$ 1.73	$ 11.79	$ 4.85
Weighted-average common shares outstanding
Diluted (in usd per share)	144.1	155.8	145.0	156.9
Basic (in shares)	143.1	154.1	143.7	155.1