CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenues	$ 80,898	$ 70,490	$ 232,596	$ 207,801
Cost of sales	(77,746)	(67,316)	(223,353)	(198,509)
Gross profit	3,152	3,174	9,243	9,292
Selling, distribution, general, and administrative expenses	(2,506)	(1,903)	(6,468)	(5,812)
Claims and litigation charges, net	0	1	2	5
Restructuring, impairment, and related charges, net	(4)	(31)	(84)	(84)
Total operating expenses	(2,510)	(1,933)	(6,550)	(5,891)
Operating income	642	1,241	2,693	3,401
Other income, net	34	276	98	466
Interest expense	(64)	(69)	(172)	(169)
Income from continuing operations before income taxes	612	1,448	2,619	3,698
Income tax benefit (expense)	18	(329)	(289)	(799)
Income from continuing operations	630	1,119	2,330	2,899
Income (loss) from discontinued operations, net of tax	0	1	0	(3)
Net income	630	1,120	2,330	2,896
Net income attributable to noncontrolling interests	(41)	(41)	(119)	(123)
Net income attributable to McKesson Corporation	$ 589	$ 1,079	$ 2,211	$ 2,773
Diluted
Continuing operations (in usd per share)	$ 4.42	$ 7.65	$ 16.39	$ 19.32
Discontinued operations (in usd per share)	0	0.01	0	(0.02)
Total (in dollars per share)	4.42	7.66	16.39	19.30
Basic
Continuing operations (in usd per share)	4.45	7.70	16.49	19.48
Discontinued operations (in usd per share)	0	0.01	0	(0.02)
Total (in dollars per share)	$ 4.45	$ 7.71	$ 16.49	$ 19.46
Weighted-average common shares outstanding
Diluted (in usd per share)	133.3	141.0	134.9	143.7
Basic (in shares)	132.5	139.9	134.0	142.5