CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenues	$ 70,490	$ 68,614	$ 207,801	$ 197,864
Cost of sales	(67,316)	(65,186)	(198,509)	(188,052)
Gross profit	3,174	3,428	9,292	9,812
Selling, distribution, general, and administrative expenses	(1,903)	(3,105)	(5,812)	(8,006)
Claims and litigation charges, net	1	(7)	5	(193)
Restructuring, impairment, and related charges, net	(31)	(18)	(84)	(208)
Total operating expenses	(1,933)	(3,130)	(5,891)	(8,407)
Operating income	1,241	298	3,401	1,405
Other income, net	276	20	466	202
Loss on debt extinguishment	0	0	0	(191)
Interest expense	(69)	(41)	(169)	(135)
Income from continuing operations before income taxes	1,448	277	3,698	1,281
Income tax expense	(329)	(238)	(799)	(396)
Income from continuing operations	1,119	39	2,899	885
Income (loss) from discontinued operations, net of tax	1	0	(3)	(3)
Net income	1,120	39	2,896	882
Net income attributable to noncontrolling interests	(41)	(46)	(123)	(136)
Net income (loss) attributable to McKesson Corporation	$ 1,079	$ (7)	$ 2,773	$ 746
Diluted
Continuing operations (in usd per share)	$ 7.65	$ (0.04)	$ 19.32	$ 4.81
Discontinued operations (in usd per share)	0.01	0	(0.02)	(0.02)
Total (in dollars per share)	7.66	(0.04)	19.30	4.79
Basic
Continuing operations (in usd per share)	7.70	(0.04)	19.48	4.87
Discontinued operations (in usd per share)	0.01	0	(0.02)	(0.02)
Total (in dollars per share)	$ 7.71	$ (0.04)	$ 19.46	$ 4.85
Weighted-average common shares outstanding
Diluted (in usd per share)	141.0	151.6	143.7	155.8
Basic (in shares)	139.9	151.6	142.5	154.0